/ Dictionary / Index O outnumber: Meaning and Definition of Find definitions for: out•num•ber Pronunciation: (out"num'bur), [key] — v.t. to exceed in number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: outnumber (Thesaurus) outmuscle out-of-body Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language