/ Dictionary / Index E eastbound: Meaning and Definition of Find definitions for: east•bound Pronunciation: (?st'bound"), [key] ? adj. traveling, proceeding, or headed east: an eastbound train. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: eastbound (Thesaurus) East Berlin Eastbourne Related Content Daily Word Quiz: abdicate Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language