noun pl. vocabularies -·lar′·ies

1. a list of words and, often, phrases, abbreviations, inflectional forms, etc., usually arranged in alphabetical order and defined or otherwise identified, as in a dictionary or glossary
2. all the words of a language
3. 1. all the words used by a particular person, socioeconomic group, profession, etc.
      in full active vocabulary
   2. all the words recognized and understood, although not necessarily used, by a particular person
      in full passive vocabulary
4. an interrelated group of nonverbal symbols, signs, gestures, etc. used for communication or expression in a particular art, skill, etc.

Etymology: ML vocabularium < L vocabulum, a word: see vocable