/ Dictionary / Index S space science: Meaning and Definition of Find definitions for: space' sci"ence Pronunciation: [key] any of the sciences involved in space travel or the exploration of space, as space medicine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. space-saving spaceship 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