Definition of not in someone's vocabulary
- (The word) "Quit" is not in my vocabulary.
: some person : somebody
: a list or collection of words or of words and phrases usually alphabetically arranged and explained or defined : lexicon
: a sum or stock of words employed by a language, group, individual, or work or in a field of knowledge
: a list or collection of terms or codes available for use (as in an indexing system)
What made you want to look up not in someone's vocabulary? Please tell us where you read or heard it (including the quote, if possible).