/ Dictionary / Index O outsize: Meaning and Definition of Find definitions for: out•size Pronunciation: (out'sīz"), [key] — n. an uncommon or irregular size, esp. one larger than average. a garment of such a size. —adj. being unusually or abnormally large, heavy, extensive, etc.: a rack of outsize dresses; an outsize puppy; pampering an outsize ego. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: outsize (Thesaurus) outsit outskirt Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language