/ Dictionary / Index S supreme commander: Meaning and Definition of Find definitions for: supreme' command'er Pronunciation: [key] the military officer commanding all allied forces in a theater of war. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Supreme Being Supreme Council Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language