/ Dictionary / Index S superorder: Meaning and Definition of Find definitions for: su•per•or•der Pronunciation: (s'pur-ôr"dur), [key] — n. Biol. a category of related orders within a class or subclass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: superorder (Thesaurus) supernumerary superordinate 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