/ Dictionary / Index S suborder: Meaning and Definition of Find definitions for: sub•or•der Pronunciation: (sub'ôr"dur), [key] — n. Biol. a category of related families within an order. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: suborder (Thesaurus) suborbital subordinal Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language