/ Dictionary / Index O outmost: Meaning and Definition of Find definitions for: out•most Pronunciation: (out'mōst" or, esp. Brit., -must), [key] — adj. farthest out; outermost. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: outmost (Thesaurus) outmoded outmuscle Related Content Daily Word Quiz: anecdote Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language