/ Dictionary / Index S spaced-out: Meaning and Definition of Find definitions for: spaced-out Pronunciation: (spāst'out'), [key] — adj. Slang. dazed or stupefied because of the influence of narcotic drugs. dreamily or eerily out of touch with reality or seemingly so; spacey. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spaced-out (Thesaurus) spacecraft spaceflight Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language