/ Dictionary / Index D Darwinism: Meaning and Definition of Find definitions for: Dar•win•ism Pronunciation: (där'wu-niz"um), [key] — n. the Darwinian theory that species originate by descent, with variation, from parent forms, through the natural selection of those individuals best adapted for the reproductive success of their kind. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: darwinism (Thesaurus) Darwinian fitness Darwin's finches Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language