/ Dictionary / Index A alterant: Meaning and Definition of Find definitions for: al•ter•ant Pronunciation: (ôl'tur-unt), [key] — adj. causing or producing alteration. —n. something that produces alteration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alterable alteration Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language