/ Dictionary / Index D discriminant: Meaning and Definition of Find definitions for: dis•crim•i•nant Pronunciation: (di-skrim'u-nunt), [key] — n. Math. a relatively simple expression that determines some of the properties, as the nature of the roots, of a given equation or function. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. discriminable discriminant function Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language