/ Dictionary / Index S supremo: Meaning and Definition of Find definitions for: su•pre•mo Pronunciation: (su-prē'mō, soo-), [key] — pl. -mos. the person in charge; chief. a person of supreme or complete power, authority, ability, etc.: His victory makes him the new chess supremo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supremo (Thesaurus) Supreme Soviet supremum Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language