/ Dictionary / Index S supination: Meaning and Definition of Find definitions for: su•pi•na•tion Pronunciation: (s"pu-nā'shun), [key] — n. rotation of the hand or forearm so that the palmar surface is facing upward (opposed to pronation). a comparable motion of the foot, consisting of adduction followed by inversion. the position assumed as the result of this rotation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supination (Thesaurus) supinate supinator Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language