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Meaning of not

not

Pronunciation: (not), [key]
— adv.
  1. (used to express negation, denial, refusal, or prohibition): You must not do that. It's not far from here.
  2. (used jocularly as a postpositive interjection to indicate that a previous statement is untrue): That's a lovely dress. Not!

not-

Pronunciation: [key]
  1. var. ofbefore a vowel.

NOT

Pronunciation: (not), [key]
  1. a Boolean operator that returns a positive result if its operand is negative and a negative result if its operand is positive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
  • not (Thesaurus)