/ Dictionary / Index S saltationism: Meaning and Definition of Find definitions for: sal•ta•tion•ism Pronunciation: (sal-tā'shu-niz"um), [key] — n. Biol. any of several theories holding that the evolution of species proceeds in major steps by the abrupt transformation of an ancestral species into a descendant species of a different type, rather than by the gradual accumulation of small changes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. saltation saltatorial Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language