/ Dictionary / Index S separationist: Meaning and Definition of Find definitions for: sep•a•ra•tion•ist Pronunciation: (sep"u-rā'shu-nist), [key] — n., adj. separatist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: separationist (Thesaurus) separation energy separation layer Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language