vocabulary Definition in the Cambridge English Dictionary
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Definition of “vocabulary” - English Dictionary

Definition of "vocabulary" - American English Dictionary

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vocabularynoun [C/U]

 us   /voʊˈkæb·jəˌler·i/
English all the words used by a ​particularperson, or all the words that ​exist in a ​particularlanguage or ​subject: [C] Reading ​helps to ​improveyour vocabulary.
(Definition of vocabulary from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "vocabulary" - British English Dictionary

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vocabularynoun

uk   /vəˈkæb.jʊ.lər.i/  us   /voʊˈkæb.jə.ler-/
A2 [C] all the words ​known and used by a ​particularperson: a wide/​limited vocabulary By the ​age of two a ​child will have a vocabulary of about two hundred words.C1 [C or U] all the words that ​exist in a ​particularlanguage or ​subject: Every ​weekourSpanishteacher gives us a ​list of vocabulary (= words) to ​learn. Computing, like any ​subject, has ​its own vocabulary.
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(Definition of vocabulary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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