/ Dictionary / Index O oversize: Meaning and Definition of Find definitions for: o•ver•size Pronunciation: (adj.ō'vur-sīz'n.ō'vur-sīz&sec), [key] — adj. of excessive size; unusually large: an oversize cigar. of a size larger than is necessary or required. —n. something that is oversize; an oversize article or object. a size larger than the proper or usual size. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oversize (Thesaurus) oversimplify overskirt Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language