/ Dictionary / Index S supine: Meaning and Definition of Find definitions for: su•pine Pronunciation: (adj.s-pīn'n.s'pīn), [key] — adj. lying on the back, face or front upward. inactive, passive, or inert, esp. from indolence or indifference. (of the hand) having the palm upward. —n. (in Latin) a noun form derived from verbs, appearing only in the accusative and the dative-ablative, as dictū in mirābile dictū, “wonderful to say.” (in English) the simple infinitive of a verb preceded by to. an analogous form in some other language. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supine (Thesaurus) supinator supp. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language