/ Dictionary / Index A ain't: Meaning and Definition of Find definitions for: ain't Pronunciation: (ānt), [key] am not; are not; is not. have not; has not; do not; does not; did not. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aineias Aintab Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language