/ Dictionary / Index E extravehicular mobility unit: Meaning and Definition of Find definitions for: ex'travehic'ular mobil'ity u"nit Pronunciation: [key] a spacesuit worn by a space-shuttle astronaut during an extravehicular activity. Abbr.: EMU Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extravehicular extraversion 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