/ Dictionary / Index P prepossess: Meaning and Definition of Find definitions for: pre•pos•sess Pronunciation: (prē"pu-zes'), [key] — v.t. to possess or dominate mentally beforehand, as a prejudice does. to prejudice or bias, esp. favorably. to impress favorably beforehand or at the outset. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prepossess (Thesaurus) prepositor prepossessing Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language