/ Dictionary / Index E extraplanetary: Meaning and Definition of Find definitions for: ex•tra•plan•e•tar•y Pronunciation: (ek"stru-plan'i-ter"ē), [key] — adj. existing or occurring in outer space beyond a planet, esp. away from Earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extraphysical extra point Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language