/ Dictionary / Index W westernmost: Meaning and Definition of Find definitions for: west•ern•most Pronunciation: (wes'turn-mōst" or, esp. Brit., -must), [key] — adj. most western or westerly; farthest west. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: westernmost (Thesaurus) western meadowlark western mountain ash Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language