/ Dictionary / Index E extravehicular: Meaning and Definition of Find definitions for: ex•tra•ve•hic•u•lar Pronunciation: (ek"stru-vē-hik'yu-lur), [key] — adj. Aerospace. of, pertaining to, or being an activity performed by an astronaut outside a space vehicle while in orbit: an extravehicular activity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extravascular extravehicular mobility unit Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language