refactor(api)!: rename Dictionary => Dict

In the api_info() output:

    :new|put =map(filter(api_info().functions, '!has_key(v:val,''deprecated_since'')'), 'v:val')
    ...

    {'return_type': 'ArrayOf(Integer, 2)', 'name': 'nvim_win_get_position', 'method': v:true, 'parameters': [['Window', 'window']], 'since': 1}

The `ArrayOf(Integer, 2)` return type didn't break clients when we added
it, which is evidence that clients don't use the `return_type` field,
thus renaming Dictionary => Dict in api_info() is not (in practice)
a breaking change.

16 files changed, 172 insertions, 179 deletions

diff --git a/src/nvim/api/autocmd.c b/src/nvim/api/autocmd.c
index ca8367b7ce..22932fd1a2 100644
--- a/src/nvim/api/autocmd.c
+++ b/src/nvim/api/autocmd.c
@@ -67,7 +67,7 @@ static int64_t next_autocmd_id = 1;
 /// NOTE: When multiple patterns or events are provided, it will find all the autocommands that
 /// match any combination of them.
 ///
-/// @param opts Dictionary with at least one of the following:
+/// @param opts Dict with at least one of the following:
 ///             - group (string|integer): the autocommand group name or id to match against.
 ///             - event (string|array): event or events to match against |autocmd-events|.
 ///             - pattern (string|array): pattern or patterns to match against |autocmd-pattern|.
@@ -270,7 +270,7 @@ Array nvim_get_autocmds(Dict(get_autocmds) *opts, Arena *arena, Error *err)
         }
       }
 
-      Dictionary autocmd_info = arena_dict(arena, 11);
+      Dict autocmd_info = arena_dict(arena, 11);
 
       if (ap->group != AUGROUP_DEFAULT) {
         PUT_C(autocmd_info, "group", INTEGER_OBJ(ap->group));
@@ -334,7 +334,7 @@ Array nvim_get_autocmds(Dict(get_autocmds) *opts, Arena *arena, Error *err)
       // PUT_C(autocmd_info, "sid", INTEGER_OBJ(ac->script_ctx.sc_sid));
       // PUT_C(autocmd_info, "lnum", INTEGER_OBJ(ac->script_ctx.sc_lnum));
 
-      kvi_push(autocmd_list, DICTIONARY_OBJ(autocmd_info));
+      kvi_push(autocmd_list, DICT_OBJ(autocmd_info));
     }
   }
 
@@ -621,7 +621,7 @@ void nvim_clear_autocmds(Dict(clear_autocmds) *opts, Arena *arena, Error *err)
 /// ```
 ///
 /// @param name String: The name of the group
-/// @param opts Dictionary Parameters
+/// @param opts Dict Parameters
 ///                 - clear (bool) optional: defaults to true. Clear existing
 ///                 commands if the group already exists |autocmd-groups|.
 /// @return Integer id of the created group.
@@ -686,7 +686,7 @@ void nvim_del_augroup_by_name(String name, Error *err)
 /// Execute all autocommands for {event} that match the corresponding
 ///  {opts} |autocmd-execute|.
 /// @param event (String|Array) The event or events to execute
-/// @param opts Dictionary of autocommand options:
+/// @param opts Dict of autocommand options:
 ///             - group (string|integer) optional: the autocommand group name or
 ///             id to match against. |autocmd-groups|.
 ///             - pattern (string|array) optional: defaults to "*" |autocmd-pattern|. Cannot be used
diff --git a/src/nvim/api/buffer.c b/src/nvim/api/buffer.c
index a0678dc3e4..3baf8a97d9 100644
--- a/src/nvim/api/buffer.c
+++ b/src/nvim/api/buffer.c
@@ -866,7 +866,7 @@ Integer nvim_buf_get_changedtick(Buffer buffer, Error *err)
 /// @param[out]  err   Error details, if any
 /// @returns Array of |maparg()|-like dictionaries describing mappings.
 ///          The "buffer" key holds the associated buffer handle.
-ArrayOf(Dictionary) nvim_buf_get_keymap(Buffer buffer, String mode, Arena *arena, Error *err)
+ArrayOf(Dict) nvim_buf_get_keymap(Buffer buffer, String mode, Arena *arena, Error *err)
   FUNC_API_SINCE(3)
 {
   buf_T *buf = find_buffer_by_handle(buffer, err);
@@ -1221,14 +1221,14 @@ Object nvim_buf_call(Buffer buffer, LuaRef fun, Error *err)
 }
 
 /// @nodoc
-Dictionary nvim__buf_stats(Buffer buffer, Arena *arena, Error *err)
+Dict nvim__buf_stats(Buffer buffer, Arena *arena, Error *err)
 {
   buf_T *buf = find_buffer_by_handle(buffer, err);
   if (!buf) {
-    return (Dictionary)ARRAY_DICT_INIT;
+    return (Dict)ARRAY_DICT_INIT;
   }
 
-  Dictionary rv = arena_dict(arena, 7);
+  Dict rv = arena_dict(arena, 7);
   // Number of times the cached line was flushed.
   // This should generally not increase while editing the same
   // line in the same mode.
diff --git a/src/nvim/api/command.c b/src/nvim/api/command.c
index 78be0a2cf7..ab57d5c009 100644
--- a/src/nvim/api/command.c
+++ b/src/nvim/api/command.c
@@ -46,7 +46,7 @@
 /// @param str       Command line string to parse. Cannot contain "\n".
 /// @param opts      Optional parameters. Reserved for future use.
 /// @param[out] err  Error details, if any.
-/// @return Dictionary containing command information, with these keys:
+/// @return Dict containing command information, with these keys:
 ///         - cmd: (string) Command name.
 ///         - range: (array) (optional) Command range ([<line1>] [<line2>]).
 ///                          Omitted if command doesn't accept a range.
@@ -63,13 +63,13 @@
 ///         - nargs: (string) Value of |:command-nargs|.
 ///         - nextcmd: (string) Next command if there are multiple commands separated by a |:bar|.
 ///                             Empty if there isn't a next command.
-///         - magic: (dictionary) Which characters have special meaning in the command arguments.
+///         - magic: (dict) Which characters have special meaning in the command arguments.
 ///             - file: (boolean) The command expands filenames. Which means characters such as "%",
 ///                               "#" and wildcards are expanded.
 ///             - bar: (boolean) The "|" character is treated as a command separator and the double
 ///                              quote character (") is treated as the start of a comment.
-///         - mods: (dictionary) |:command-modifiers|.
-///             - filter: (dictionary) |:filter|.
+///         - mods: (dict) |:command-modifiers|.
+///             - filter: (dict) |:filter|.
 ///                 - pattern: (string) Filter pattern. Empty string if there is no filter.
 ///                 - force: (boolean) Whether filter is inverted or not.
 ///             - silent: (boolean) |:silent|.
@@ -230,12 +230,12 @@ Dict(cmd) nvim_parse_cmd(String str, Dict(empty) *opts, Arena *arena, Error *err
   PUT_KEY(result, cmd, nextcmd, CSTR_AS_OBJ(ea.nextcmd));
 
   // TODO(bfredl): nested keydict would be nice..
-  Dictionary mods = arena_dict(arena, 20);
+  Dict mods = arena_dict(arena, 20);
 
-  Dictionary filter = arena_dict(arena, 2);
+  Dict filter = arena_dict(arena, 2);
   PUT_C(filter, "pattern", CSTR_TO_ARENA_OBJ(arena, cmdinfo.cmdmod.cmod_filter_pat));
   PUT_C(filter, "force", BOOLEAN_OBJ(cmdinfo.cmdmod.cmod_filter_force));
-  PUT_C(mods, "filter", DICTIONARY_OBJ(filter));
+  PUT_C(mods, "filter", DICT_OBJ(filter));
 
   PUT_C(mods, "silent", BOOLEAN_OBJ(cmdinfo.cmdmod.cmod_flags & CMOD_SILENT));
   PUT_C(mods, "emsg_silent", BOOLEAN_OBJ(cmdinfo.cmdmod.cmod_flags & CMOD_ERRSILENT));
@@ -272,7 +272,7 @@ Dict(cmd) nvim_parse_cmd(String str, Dict(empty) *opts, Arena *arena, Error *err
 
   PUT_KEY(result, cmd, mods, mods);
 
-  Dictionary magic = arena_dict(arena, 2);
+  Dict magic = arena_dict(arena, 2);
   PUT_C(magic, "file", BOOLEAN_OBJ(cmdinfo.magic.file));
   PUT_C(magic, "bar", BOOLEAN_OBJ(cmdinfo.magic.bar));
   PUT_KEY(result, cmd, magic, magic);
@@ -284,7 +284,7 @@ end:
 
 /// Executes an Ex command.
 ///
-/// Unlike |nvim_command()| this command takes a structured Dictionary instead of a String. This
+/// Unlike |nvim_command()| this command takes a structured Dict instead of a String. This
 /// allows for easier construction and manipulation of an Ex command. This also allows for things
 /// such as having spaces inside a command argument, expanding filenames in a command that otherwise
 /// doesn't expand filenames, etc. Command arguments may also be Number, Boolean or String.
@@ -298,7 +298,7 @@ end:
 /// @see |nvim_exec2()|
 /// @see |nvim_command()|
 ///
-/// @param cmd       Command to execute. Must be a Dictionary that can contain the same values as
+/// @param cmd       Command to execute. Must be a Dict that can contain the same values as
 ///                  the return value of |nvim_parse_cmd()| except "addr", "nargs" and "nextcmd"
 ///                  which are ignored if provided. All values except for "cmd" are optional.
 /// @param opts      Optional parameters.
@@ -1166,7 +1166,7 @@ err:
 /// @param[out]  err   Error details, if any.
 ///
 /// @returns Map of maps describing commands.
-Dictionary nvim_get_commands(Dict(get_commands) *opts, Arena *arena, Error *err)
+Dict nvim_get_commands(Dict(get_commands) *opts, Arena *arena, Error *err)
   FUNC_API_SINCE(4)
 {
   return nvim_buf_get_commands(-1, opts, arena, err);
@@ -1179,25 +1179,25 @@ Dictionary nvim_get_commands(Dict(get_commands) *opts, Arena *arena, Error *err)
 /// @param[out]  err   Error details, if any.
 ///
 /// @returns Map of maps describing commands.
-Dictionary nvim_buf_get_commands(Buffer buffer, Dict(get_commands) *opts, Arena *arena, Error *err)
+Dict nvim_buf_get_commands(Buffer buffer, Dict(get_commands) *opts, Arena *arena, Error *err)
   FUNC_API_SINCE(4)
 {
   bool global = (buffer == -1);
   if (ERROR_SET(err)) {
-    return (Dictionary)ARRAY_DICT_INIT;
+    return (Dict)ARRAY_DICT_INIT;
   }
 
   if (global) {
     if (opts->builtin) {
       api_set_error(err, kErrorTypeValidation, "builtin=true not implemented");
-      return (Dictionary)ARRAY_DICT_INIT;
+      return (Dict)ARRAY_DICT_INIT;
     }
     return commands_array(NULL, arena);
   }
 
   buf_T *buf = find_buffer_by_handle(buffer, err);
   if (opts->builtin || !buf) {
-    return (Dictionary)ARRAY_DICT_INIT;
+    return (Dict)ARRAY_DICT_INIT;
   }
   return commands_array(buf, arena);
 }
diff --git a/src/nvim/api/deprecated.c b/src/nvim/api/deprecated.c
index a1af354577..6376011106 100644
--- a/src/nvim/api/deprecated.c
+++ b/src/nvim/api/deprecated.c
@@ -183,11 +183,11 @@ Integer nvim_buf_set_virtual_text(Buffer buffer, Integer src_id, Integer line, A
 /// @param[out] err Error details, if any
 /// @return Highlight definition map
 /// @see nvim_get_hl_by_name
-Dictionary nvim_get_hl_by_id(Integer hl_id, Boolean rgb, Arena *arena, Error *err)
+Dict nvim_get_hl_by_id(Integer hl_id, Boolean rgb, Arena *arena, Error *err)
   FUNC_API_SINCE(3)
   FUNC_API_DEPRECATED_SINCE(9)
 {
-  Dictionary dic = ARRAY_DICT_INIT;
+  Dict dic = ARRAY_DICT_INIT;
   VALIDATE_INT((syn_get_final_id((int)hl_id) != 0), "highlight id", hl_id, {
     return dic;
   });
@@ -204,11 +204,11 @@ Dictionary nvim_get_hl_by_id(Integer hl_id, Boolean rgb, Arena *arena, Error *er
 /// @param[out] err Error details, if any
 /// @return Highlight definition map
 /// @see nvim_get_hl_by_id
-Dictionary nvim_get_hl_by_name(String name, Boolean rgb, Arena *arena, Error *err)
+Dict nvim_get_hl_by_name(String name, Boolean rgb, Arena *arena, Error *err)
   FUNC_API_SINCE(3)
   FUNC_API_DEPRECATED_SINCE(9)
 {
-  Dictionary result = ARRAY_DICT_INIT;
+  Dict result = ARRAY_DICT_INIT;
   int id = syn_name2id(name.data);
 
   VALIDATE_S((id != 0), "highlight name", name.data, {
@@ -515,7 +515,7 @@ static int64_t convert_index(int64_t index)
 /// @param          name Option name
 /// @param[out] err Error details, if any
 /// @return         Option Information
-Dictionary nvim_get_option_info(String name, Arena *arena, Error *err)
+Dict nvim_get_option_info(String name, Arena *arena, Error *err)
   FUNC_API_SINCE(7)
   FUNC_API_DEPRECATED_SINCE(11)
 {
diff --git a/src/nvim/api/extmark.c b/src/nvim/api/extmark.c
index d694b64f66..7786c30624 100644
--- a/src/nvim/api/extmark.c
+++ b/src/nvim/api/extmark.c
@@ -74,10 +74,10 @@ Integer nvim_create_namespace(String name)
 /// Gets existing, non-anonymous |namespace|s.
 ///
 /// @return dict that maps from names to namespace ids.
-Dictionary nvim_get_namespaces(Arena *arena)
+Dict nvim_get_namespaces(Arena *arena)
   FUNC_API_SINCE(5)
 {
-  Dictionary retval = arena_dict(arena, map_size(&namespace_ids));
+  Dict retval = arena_dict(arena, map_size(&namespace_ids));
   String name;
   handle_T id;
 
@@ -158,7 +158,7 @@ static Array extmark_to_array(MTPair extmark, bool id, bool add_dict, bool hl_na
   if (add_dict) {
     // TODO(bfredl): coding the size like this is a bit fragile.
     // We want ArrayOf(Dict(set_extmark)) as the return type..
-    Dictionary dict = arena_dict(arena, ARRAY_SIZE(set_extmark_table));
+    Dict dict = arena_dict(arena, ARRAY_SIZE(set_extmark_table));
 
     PUT_C(dict, "ns_id", INTEGER_OBJ((Integer)start.ns));
 
@@ -183,7 +183,7 @@ static Array extmark_to_array(MTPair extmark, bool id, bool add_dict, bool hl_na
 
     decor_to_dict_legacy(&dict, mt_decor(start), hl_name, arena);
 
-    ADD_C(rv, DICTIONARY_OBJ(dict));
+    ADD_C(rv, DICT_OBJ(dict));
   }
 
   return rv;
diff --git a/src/nvim/api/keysets_defs.h b/src/nvim/api/keysets_defs.h
index ce4e3d56e1..552612dd13 100644
--- a/src/nvim/api/keysets_defs.h
+++ b/src/nvim/api/keysets_defs.h
@@ -275,8 +275,8 @@ typedef struct {
   String reg;
   Boolean bang;
   Array args;
-  Dictionary magic;
-  Dictionary mods;
+  Dict magic;
+  Dict mods;
   Object nargs;
   Object addr;
   Object nextcmd;
@@ -293,7 +293,7 @@ typedef struct {
   Boolean silent;
   Boolean emsg_silent;
   Boolean unsilent;
-  Dictionary filter;
+  Dict filter;
   Boolean sandbox;
   Boolean noautocmd;
   Boolean browse;
diff --git a/src/nvim/api/options.c b/src/nvim/api/options.c
index 5adaff8449..1a0edd551e 100644
--- a/src/nvim/api/options.c
+++ b/src/nvim/api/options.c
@@ -256,13 +256,13 @@ void nvim_set_option_value(uint64_t channel_id, String name, Object value, Dict(
 
 /// Gets the option information for all options.
 ///
-/// The dictionary has the full option names as keys and option metadata
-/// dictionaries as detailed at |nvim_get_option_info2()|.
+/// The dict has the full option names as keys and option metadata dicts as detailed at
+/// |nvim_get_option_info2()|.
 ///
 /// @see |nvim_get_commands()|
 ///
-/// @return dictionary of all options
-Dictionary nvim_get_all_options_info(Arena *arena, Error *err)
+/// @return dict of all options
+Dict nvim_get_all_options_info(Arena *arena, Error *err)
   FUNC_API_SINCE(7)
 {
   return get_all_vimoptions(arena);
@@ -270,7 +270,7 @@ Dictionary nvim_get_all_options_info(Arena *arena, Error *err)
 
 /// Gets the option information for one option from arbitrary buffer or window
 ///
-/// Resulting dictionary has keys:
+/// Resulting dict has keys:
 /// - name: Name of the option (like 'filetype')
 /// - shortname: Shortened name of the option (like 'ft')
 /// - type: type of option ("string", "number" or "boolean")
@@ -301,7 +301,7 @@ Dictionary nvim_get_all_options_info(Arena *arena, Error *err)
 ///                         Implies {scope} is "local".
 /// @param[out] err Error details, if any
 /// @return         Option Information
-Dictionary nvim_get_option_info2(String name, Dict(option) *opts, Arena *arena, Error *err)
+Dict nvim_get_option_info2(String name, Dict(option) *opts, Arena *arena, Error *err)
   FUNC_API_SINCE(11)
 {
   OptIndex opt_idx = 0;
@@ -310,7 +310,7 @@ Dictionary nvim_get_option_info2(String name, Dict(option) *opts, Arena *arena,
   void *from = NULL;
   if (!validate_option_value_args(opts, name.data, &opt_idx, &scope, &req_scope, &from, NULL,
                                   err)) {
-    return (Dictionary)ARRAY_DICT_INIT;
+    return (Dict)ARRAY_DICT_INIT;
   }
 
   buf_T *buf = (req_scope == kOptReqBuf) ? (buf_T *)from : curbuf;
diff --git a/src/nvim/api/private/converter.c b/src/nvim/api/private/converter.c
index a1c5816a49..59e7373f68 100644
--- a/src/nvim/api/private/converter.c
+++ b/src/nvim/api/private/converter.c
@@ -94,8 +94,7 @@ static Object typval_cbuf_to_obj(EncodedData *edata, const char *data, size_t le
   kvi_push(edata->stack, ARRAY_OBJ(((Array) { .capacity = 0, .size = 0 })))
 
 #define TYPVAL_ENCODE_CONV_EMPTY_DICT(tv, dict) \
-  kvi_push(edata->stack, \
-           DICTIONARY_OBJ(((Dictionary) { .capacity = 0, .size = 0 })))
+  kvi_push(edata->stack, DICT_OBJ(((Dict) { .capacity = 0, .size = 0 })))
 
 static inline void typval_encode_list_start(EncodedData *const edata, const size_t len)
   FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_NONNULL_ALL
@@ -137,7 +136,7 @@ static inline void typval_encode_list_end(EncodedData *const edata)
 static inline void typval_encode_dict_start(EncodedData *const edata, const size_t len)
   FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_NONNULL_ALL
 {
-  kvi_push(edata->stack, DICTIONARY_OBJ(arena_dict(edata->arena, len)));
+  kvi_push(edata->stack, DICT_OBJ(arena_dict(edata->arena, len)));
 }
 
 #define TYPVAL_ENCODE_CONV_DICT_START(tv, dict, len) \
@@ -152,13 +151,13 @@ static inline void typval_encode_after_key(EncodedData *const edata)
 {
   Object key = kv_pop(edata->stack);
   Object *const dict = &kv_last(edata->stack);
-  assert(dict->type == kObjectTypeDictionary);
-  assert(dict->data.dictionary.size < dict->data.dictionary.capacity);
+  assert(dict->type == kObjectTypeDict);
+  assert(dict->data.dict.size < dict->data.dict.capacity);
   if (key.type == kObjectTypeString) {
-    dict->data.dictionary.items[dict->data.dictionary.size].key
+    dict->data.dict.items[dict->data.dict.size].key
       = key.data.string;
   } else {
-    dict->data.dictionary.items[dict->data.dictionary.size].key
+    dict->data.dict.items[dict->data.dict.size].key
       = STATIC_CSTR_AS_STRING("__INVALID_KEY__");
   }
 }
@@ -171,9 +170,9 @@ static inline void typval_encode_between_dict_items(EncodedData *const edata)
 {
   Object val = kv_pop(edata->stack);
   Object *const dict = &kv_last(edata->stack);
-  assert(dict->type == kObjectTypeDictionary);
-  assert(dict->data.dictionary.size < dict->data.dictionary.capacity);
-  dict->data.dictionary.items[dict->data.dictionary.size++].value = val;
+  assert(dict->type == kObjectTypeDict);
+  assert(dict->data.dict.size < dict->data.dict.capacity);
+  dict->data.dict.items[dict->data.dict.size++].value = val;
 }
 
 #define TYPVAL_ENCODE_CONV_DICT_BETWEEN_ITEMS(tv, dict) \
@@ -185,7 +184,7 @@ static inline void typval_encode_dict_end(EncodedData *const edata)
   typval_encode_between_dict_items(edata);
 #ifndef NDEBUG
   const Object *const dict = &kv_last(edata->stack);
-  assert(dict->data.dictionary.size == dict->data.dictionary.capacity);
+  assert(dict->data.dict.size == dict->data.dict.capacity);
 #endif
 }
 
@@ -325,11 +324,11 @@ void object_to_vim_take_luaref(Object *obj, typval_T *tv, bool take_luaref, Erro
     break;
   }
 
-  case kObjectTypeDictionary: {
+  case kObjectTypeDict: {
     dict_T *const dict = tv_dict_alloc();
 
-    for (uint32_t i = 0; i < obj->data.dictionary.size; i++) {
-      KeyValuePair *item = &obj->data.dictionary.items[i];
+    for (uint32_t i = 0; i < obj->data.dict.size; i++) {
+      KeyValuePair *item = &obj->data.dict.items[i];
       String key = item->key;
       dictitem_T *const di = tv_dict_item_alloc(key.data);
       object_to_vim_take_luaref(&item->value, &di->di_tv, take_luaref, err);
diff --git a/src/nvim/api/private/defs.h b/src/nvim/api/private/defs.h
index ac3404cf86..26d5ac09a8 100644
--- a/src/nvim/api/private/defs.h
+++ b/src/nvim/api/private/defs.h
@@ -17,7 +17,7 @@
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # define ArrayOf(...) Array
-# define DictionaryOf(...) Dictionary
+# define DictOf(...) Dict
 # define Dict(name) KeyDict_##name
 # define DictHash(name) KeyDict_##name##_get_field
 # define DictKey(name)
@@ -88,7 +88,7 @@ typedef struct object Object;
 typedef kvec_t(Object) Array;
 
 typedef struct key_value_pair KeyValuePair;
-typedef kvec_t(KeyValuePair) Dictionary;
+typedef kvec_t(KeyValuePair) Dict;
 
 typedef kvec_t(String) StringArray;
 
@@ -99,7 +99,7 @@ typedef enum {
   kObjectTypeFloat,
   kObjectTypeString,
   kObjectTypeArray,
-  kObjectTypeDictionary,
+  kObjectTypeDict,
   kObjectTypeLuaRef,
   // EXT types, cannot be split or reordered, see #EXT_OBJECT_TYPE_SHIFT
   kObjectTypeBuffer,
@@ -127,7 +127,7 @@ struct object {
     Float floating;
     String string;
     Array array;
-    Dictionary dictionary;
+    Dict dict;
     LuaRef luaref;
   } data;
 };
diff --git a/src/nvim/api/private/helpers.c b/src/nvim/api/private/helpers.c
index 23119f7ada..e1fb4ed732 100644
--- a/src/nvim/api/private/helpers.c
+++ b/src/nvim/api/private/helpers.c
@@ -198,7 +198,7 @@ dictitem_T *dict_check_writable(dict_T *dict, String key, bool del, Error *err)
       api_set_error(err, kErrorTypeException, "Key is fixed: %s", key.data);
     }
   } else if (dict->dv_lock) {
-    api_set_error(err, kErrorTypeException, "Dictionary is locked");
+    api_set_error(err, kErrorTypeException, "Dict is locked");
   } else if (key.size == 0) {
     api_set_error(err, kErrorTypeValidation, "Key name is empty");
   } else if (key.size > INT_MAX) {
@@ -551,9 +551,9 @@ Array arena_array(Arena *arena, size_t max_size)
   return arr;
 }
 
-Dictionary arena_dict(Arena *arena, size_t max_size)
+Dict arena_dict(Arena *arena, size_t max_size)
 {
-  Dictionary dict = ARRAY_DICT_INIT;
+  Dict dict = ARRAY_DICT_INIT;
   kv_fixsize_arena(arena, dict, max_size);
   return dict;
 }
@@ -596,8 +596,8 @@ void api_free_object(Object value)
     api_free_array(value.data.array);
     break;
 
-  case kObjectTypeDictionary:
-    api_free_dictionary(value.data.dictionary);
+  case kObjectTypeDict:
+    api_free_dict(value.data.dict);
     break;
 
   case kObjectTypeLuaRef:
@@ -615,7 +615,7 @@ void api_free_array(Array value)
   xfree(value.items);
 }
 
-void api_free_dictionary(Dictionary value)
+void api_free_dict(Dict value)
 {
   for (size_t i = 0; i < value.size; i++) {
     api_free_string(value.items[i].key);
@@ -648,7 +648,7 @@ Object api_metadata(void)
     Arena arena = ARENA_EMPTY;
     Error err = ERROR_INIT;
     metadata = unpack((char *)packed_api_metadata, sizeof(packed_api_metadata), &arena, &err);
-    if (ERROR_SET(&err) || metadata.type != kObjectTypeDictionary) {
+    if (ERROR_SET(&err) || metadata.type != kObjectTypeDict) {
       abort();
     }
     mem_for_metadata = arena_finish(&arena);
@@ -684,9 +684,9 @@ Array copy_array(Array array, Arena *arena)
   return rv;
 }
 
-Dictionary copy_dictionary(Dictionary dict, Arena *arena)
+Dict copy_dict(Dict dict, Arena *arena)
 {
-  Dictionary rv = arena_dict(arena, dict.size);
+  Dict rv = arena_dict(arena, dict.size);
   for (size_t i = 0; i < dict.size; i++) {
     KeyValuePair item = dict.items[i];
     PUT_C(rv, copy_string(item.key, arena).data, copy_object(item.value, arena));
@@ -713,8 +713,8 @@ Object copy_object(Object obj, Arena *arena)
   case kObjectTypeArray:
     return ARRAY_OBJ(copy_array(obj.data.array, arena));
 
-  case kObjectTypeDictionary:
-    return DICTIONARY_OBJ(copy_dictionary(obj.data.dictionary, arena));
+  case kObjectTypeDict:
+    return DICT_OBJ(copy_dict(obj.data.dict, arena));
 
   case kObjectTypeLuaRef:
     return LUAREF_OBJ(api_new_luaref(obj.data.luaref));
@@ -791,7 +791,7 @@ char *api_typename(ObjectType t)
     return "String";
   case kObjectTypeArray:
     return "Array";
-  case kObjectTypeDictionary:
+  case kObjectTypeDict:
     return "Dict";
   case kObjectTypeLuaRef:
     return "Function";
@@ -844,7 +844,7 @@ free_exit:
 }
 
 // see also nlua_pop_keydict for the lua specific implementation
-bool api_dict_to_keydict(void *retval, FieldHashfn hashy, Dictionary dict, Error *err)
+bool api_dict_to_keydict(void *retval, FieldHashfn hashy, Dict dict, Error *err)
 {
   for (size_t i = 0; i < dict.size; i++) {
     String k = dict.items[i].key;
@@ -908,13 +908,13 @@ bool api_dict_to_keydict(void *retval, FieldHashfn hashy, Dictionary dict, Error
         return false;
       });
       *(Array *)mem = value->data.array;
-    } else if (field->type == kObjectTypeDictionary) {
-      Dictionary *val = (Dictionary *)mem;
+    } else if (field->type == kObjectTypeDict) {
+      Dict *val = (Dict *)mem;
       // allow empty array as empty dict for lua (directly or via lua-client RPC)
       if (value->type == kObjectTypeArray && value->data.array.size == 0) {
-        *val = (Dictionary)ARRAY_DICT_INIT;
-      } else if (value->type == kObjectTypeDictionary) {
-        *val = value->data.dictionary;
+        *val = (Dict)ARRAY_DICT_INIT;
+      } else if (value->type == kObjectTypeDict) {
+        *val = value->data.dict;
       } else {
         api_err_exp(err, field->str, api_typename((ObjectType)field->type),
                     api_typename(value->type));
@@ -941,9 +941,9 @@ bool api_dict_to_keydict(void *retval, FieldHashfn hashy, Dictionary dict, Error
   return true;
 }
 
-Dictionary api_keydict_to_dict(void *value, KeySetLink *table, size_t max_size, Arena *arena)
+Dict api_keydict_to_dict(void *value, KeySetLink *table, size_t max_size, Arena *arena)
 {
-  Dictionary rv = arena_dict(arena, max_size);
+  Dict rv = arena_dict(arena, max_size);
   for (size_t i = 0; table[i].str; i++) {
     KeySetLink *field = &table[i];
     bool is_set = true;
@@ -971,8 +971,8 @@ Dictionary api_keydict_to_dict(void *value, KeySetLink *table, size_t max_size,
       val = STRING_OBJ(*(String *)mem);
     } else if (field->type == kObjectTypeArray) {
       val = ARRAY_OBJ(*(Array *)mem);
-    } else if (field->type == kObjectTypeDictionary) {
-      val = DICTIONARY_OBJ(*(Dictionary *)mem);
+    } else if (field->type == kObjectTypeDict) {
+      val = DICT_OBJ(*(Dict *)mem);
     } else if (field->type == kObjectTypeBuffer || field->type == kObjectTypeWindow
                || field->type == kObjectTypeTabpage) {
       val.data.integer = *(handle_T *)mem;
@@ -1002,8 +1002,8 @@ void api_luarefs_free_object(Object value)
     api_luarefs_free_array(value.data.array);
     break;
 
-  case kObjectTypeDictionary:
-    api_luarefs_free_dict(value.data.dictionary);
+  case kObjectTypeDict:
+    api_luarefs_free_dict(value.data.dict);
     break;
 
   default:
@@ -1019,8 +1019,8 @@ void api_luarefs_free_keydict(void *dict, KeySetLink *table)
       api_luarefs_free_object(*(Object *)mem);
     } else if (table[i].type == kObjectTypeLuaRef) {
       api_free_luaref(*(LuaRef *)mem);
-    } else if (table[i].type == kObjectTypeDictionary) {
-      api_luarefs_free_dict(*(Dictionary *)mem);
+    } else if (table[i].type == kObjectTypeDict) {
+      api_luarefs_free_dict(*(Dict *)mem);
     }
   }
 }
@@ -1032,7 +1032,7 @@ void api_luarefs_free_array(Array value)
   }
 }
 
-void api_luarefs_free_dict(Dictionary value)
+void api_luarefs_free_dict(Dict value)
 {
   for (size_t i = 0; i < value.size; i++) {
     api_luarefs_free_object(value.items[i].value);
diff --git a/src/nvim/api/private/helpers.h b/src/nvim/api/private/helpers.h
index 7eda8ffaf6..57932e067e 100644
--- a/src/nvim/api/private/helpers.h
+++ b/src/nvim/api/private/helpers.h
@@ -53,9 +53,9 @@
     .type = kObjectTypeArray, \
     .data.array = a })
 
-#define DICTIONARY_OBJ(d) ((Object) { \
-    .type = kObjectTypeDictionary, \
-    .data.dictionary = d })
+#define DICT_OBJ(d) ((Object) { \
+    .type = kObjectTypeDict, \
+    .data.dict = d })
 
 #define LUAREF_OBJ(r) ((Object) { \
     .type = kObjectTypeLuaRef, \
@@ -90,7 +90,7 @@
   name.items = name##__items; \
 
 #define MAXSIZE_TEMP_DICT(name, maxsize) \
-  Dictionary name = ARRAY_DICT_INIT; \
+  Dict name = ARRAY_DICT_INIT; \
   KeyValuePair name##__items[maxsize]; \
   name.capacity = maxsize; \
   name.items = name##__items; \
@@ -121,7 +121,7 @@ typedef kvec_withinit_t(Object, 16) ArrayBuilder;
 #define api_init_tabpage
 #define api_init_object = NIL
 #define api_init_array = ARRAY_DICT_INIT
-#define api_init_dictionary = ARRAY_DICT_INIT
+#define api_init_dict = ARRAY_DICT_INIT
 
 #define KEYDICT_INIT { 0 }
 
diff --git a/src/nvim/api/private/validate.h b/src/nvim/api/private/validate.h
index 2c1d1a241d..67af8adea8 100644
--- a/src/nvim/api/private/validate.h
+++ b/src/nvim/api/private/validate.h
@@ -42,7 +42,7 @@
 
 #define VALIDATE_T(name, expected_t, actual_t, code) \
   do { \
-    STATIC_ASSERT(expected_t != kObjectTypeDictionary, "use VALIDATE_T_DICT"); \
+    STATIC_ASSERT(expected_t != kObjectTypeDict, "use VALIDATE_T_DICT"); \
     if (expected_t != actual_t) { \
       api_err_exp(err, name, api_typename(expected_t), api_typename(actual_t)); \
       code; \
@@ -52,7 +52,7 @@
 /// Checks that `obj_` has type `expected_t`.
 #define VALIDATE_T2(obj_, expected_t, code) \
   do { \
-    STATIC_ASSERT(expected_t != kObjectTypeDictionary, "use VALIDATE_T_DICT"); \
+    STATIC_ASSERT(expected_t != kObjectTypeDict, "use VALIDATE_T_DICT"); \
     if ((obj_).type != expected_t) { \
       api_err_exp(err, STR(obj_), api_typename(expected_t), api_typename((obj_).type)); \
       code; \
@@ -62,11 +62,11 @@
 /// Checks that `obj_` has Dict type. Also allows empty Array in a Lua context.
 #define VALIDATE_T_DICT(name, obj_, code) \
   do { \
-    if ((obj_).type != kObjectTypeDictionary \
+    if ((obj_).type != kObjectTypeDict \
         && !(channel_id == LUA_INTERNAL_CALL \
              && (obj_).type == kObjectTypeArray \
              && (obj_).data.array.size == 0)) { \
-      api_err_exp(err, name, api_typename(kObjectTypeDictionary), api_typename((obj_).type)); \
+      api_err_exp(err, name, api_typename(kObjectTypeDict), api_typename((obj_).type)); \
       code; \
     } \
   } while (0)
diff --git a/src/nvim/api/ui.c b/src/nvim/api/ui.c
index 5dc373acdc..b09a9ed253 100644
--- a/src/nvim/api/ui.c
+++ b/src/nvim/api/ui.c
@@ -128,8 +128,7 @@ void remote_ui_wait_for_attach(bool only_stdio)
 /// @param height  Requested screen rows
 /// @param options  |ui-option| map
 /// @param[out] err Error details, if any
-void nvim_ui_attach(uint64_t channel_id, Integer width, Integer height, Dictionary options,
-                    Error *err)
+void nvim_ui_attach(uint64_t channel_id, Integer width, Integer height, Dict options, Error *err)
   FUNC_API_SINCE(1) FUNC_API_REMOTE_ONLY
 {
   if (map_has(uint64_t, &connected_uis, channel_id)) {
@@ -687,8 +686,8 @@ void remote_ui_hl_attr_define(RemoteUI *ui, Integer id, HlAttrs rgb_attrs, HlAtt
     PUT_C(rgb, "url", CSTR_AS_OBJ(url));
   }
 
-  ADD_C(args, DICTIONARY_OBJ(rgb));
-  ADD_C(args, DICTIONARY_OBJ(cterm));
+  ADD_C(args, DICT_OBJ(rgb));
+  ADD_C(args, DICT_OBJ(cterm));
 
   if (ui->ui_ext[kUIHlState]) {
     ADD_C(args, ARRAY_OBJ(info));
@@ -709,7 +708,7 @@ void remote_ui_highlight_set(RemoteUI *ui, int id)
   MAXSIZE_TEMP_DICT(dict, HLATTRS_DICT_SIZE);
   hlattrs2dict(&dict, NULL, syn_attr2entry(id), ui->rgb, false);
   MAXSIZE_TEMP_ARRAY(args, 1);
-  ADD_C(args, DICTIONARY_OBJ(dict));
+  ADD_C(args, DICT_OBJ(dict));
   push_call(ui, "highlight_set", args);
 }
 
@@ -920,11 +919,11 @@ static Array translate_contents(RemoteUI *ui, Array contents, Arena *arena)
     Array new_item = arena_array(arena, 2);
     int attr = (int)item.items[0].data.integer;
     if (attr) {
-      Dictionary rgb_attrs = arena_dict(arena, HLATTRS_DICT_SIZE);
+      Dict rgb_attrs = arena_dict(arena, HLATTRS_DICT_SIZE);
       hlattrs2dict(&rgb_attrs, NULL, syn_attr2entry(attr), ui->rgb, false);
-      ADD_C(new_item, DICTIONARY_OBJ(rgb_attrs));
+      ADD_C(new_item, DICT_OBJ(rgb_attrs));
     } else {
-      ADD_C(new_item, DICTIONARY_OBJ((Dictionary)ARRAY_DICT_INIT));
+      ADD_C(new_item, DICT_OBJ((Dict)ARRAY_DICT_INIT));
     }
     ADD_C(new_item, item.items[1]);
     ADD_C(new_contents, ARRAY_OBJ(new_item));
diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 3d60dfa8ab..c1add75af9 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -117,7 +117,7 @@ Integer nvim_get_hl_id_by_name(String name)
 /// @param[out] err Error details, if any.
 /// @return Highlight groups as a map from group name to a highlight definition map as in |nvim_set_hl()|,
 ///                   or only a single highlight definition map if requested by name or id.
-Dictionary nvim_get_hl(Integer ns_id, Dict(get_highlight) *opts, Arena *arena, Error *err)
+Dict nvim_get_hl(Integer ns_id, Dict(get_highlight) *opts, Arena *arena, Error *err)
   FUNC_API_SINCE(11)
 {
   return ns_get_hl_defs((NS)ns_id, opts, arena, err);
@@ -526,13 +526,1