/ Dictionary / Index P predictor: Meaning and Definition of Find definitions for: pre•dic•tor Pronunciation: (pri-dik'tur), [key] — n. a person or thing that predicts. a formula for determining additional values or derivatives of a function from the relationship of its given values. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: predictor (Thesaurus) predictive predictory Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language