/ Dictionary / Index S supernational: Meaning and Definition of Find definitions for: su•per•na•tion•al Pronunciation: (s"pur-nash'u-nl), [key] — adj. tending to involve, or extending authority over, more than one nation; international; supranational. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. supernatant supernationalism Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language