vo·cab·u·lary 
/voʊˈkæbjəˌleri, Brit vəʊˈkæbjələri/ noun
plural vo·cab·u·lar·ies /voʊˈkæbjəˌleri, Brit vəʊˈkæbjələri/ noun 1 [count] : the words that make up a language
▪ the basic vocabulary of English 2 : all of the words known and used by a person [noncount] ▪ She has learned a lot of new vocabulary. [count] ▪ He has a large/wide vocabulary. [=he knows and uses many words] ▪ He has a somewhat limited vocabulary. ▪ Reading helped to expand/improve her vocabulary. ▪ Our passive vocabulary [=the words we understand] is larger than our active vocabulary. [=the words we use ourselves] — sometimes used in an exaggerated way to make a forceful statement ▪ (The word) “Quit” is not in my vocabulary. [=I will not quit; I refuse to quit] 3 [count, noncount] : words that are related to a particular subject
▪ the vocabulary of the art world ▪ The Internet has given us a whole new vocabulary. 4 [count, noncount] : a set of forms or elements that are used for expression in an art, in music, etc.
▪ a rich musical vocabulary ▪ architectural vocabulary
▪ the basic vocabulary of English
▪ the vocabulary of the art world ▪ The Internet has given us a whole new vocabulary.
▪ a rich musical vocabulary ▪ architectural vocabulary
