/ Dictionary / Index S superalloy: Meaning and Definition of Find definitions for: su•per•al•loy Pronunciation: (s'pur-al"oi), [key] — n. an alloy, often with a nickel, nickel-iron, or cobalt base, capable of withstanding very high temperatures, used in jet engines, rockets, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. superagency superaltern Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language