/ Dictionary / Index H heterogeneity: Meaning and Definition of Find definitions for: het•er•o•ge•ne•i•ty Pronunciation: (het"u-rō-ju-nē'i-tē), [key] — n. the quality or state of being heterogeneous; composition from dissimilar parts; disparateness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heterogeneity (Thesaurus) heterogamy heterogeneous Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language