Breadcrumb Home > Dictionary > Index S superaltern: Meaning and Definition of Find definitions for: su•per•al•tern Pronunciation: (s"pur-ôl'turn), [key] — n. Logic. a universal proposition that is the basis for the immediate inference of a corresponding particular proposition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. superalloy superannuate ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language