/ Dictionary / Index E eastbound: Meaning and Definition of Find definitions for: east•bound Pronunciation: (ēst'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: 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