/ Dictionary / Index H heathenism: Meaning and Definition of Find definitions for: hea•then•ism Pronunciation: (hē'u-niz"um), [key] — n. a belief or practice of heathens; idolatry. barbaric morals or behavior; barbarism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heathenism (Thesaurus) heathenish heathenize 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