/ Dictionary / Index S space probe: Meaning and Definition of Find definitions for: space' probe" Pronunciation: [key] an unmanned spacecraft designed to explore the solar system and transmit data back to earth. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spaceport space rate Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language