the words employed by a language, group, or individual, or in a field of work or knowledge
She has a very limited vocabulary
a list or collection of terms or codes available for use, e.g. in an indexing system
a list of words, and sometimes phrases, usu arranged alphabetically and defined or translated
There's a vocabulary at the back of the book
a supply of expressive techniques or devices, e.g. of an art form
[early French vocabulaire from medieval Latin vocabularius verbal, from Latin vocabulum: see vocable]