/ Dictionary / Index O overhear: Meaning and Definition of Find definitions for: o•ver•hear Pronunciation: (ō"vur-hēr'), [key] — -heard, -hear•ing. to hear (speech or a speaker) without the speaker's intention or knowledge: I accidentally overheard what they were saying. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overhear (Thesaurus) overhead-valve engine overheat Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language