/ Dictionary / Index E easternmost: Meaning and Definition of Find definitions for: east•ern•most Pronunciation: (ē'sturn-mōst" or, esp. Brit., -must), [key] — adj. farthest east. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: easternmost (Thesaurus) eastern meadowlark Eastern Orthodox Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language