/ Dictionary / Index O outsleep: Meaning and Definition of Find definitions for: out•sleep Pronunciation: (out"slēp'), [key] — -slept, -sleep•ing. to sleep through or later than (a specified time). to sleep until the end of: to outsleep a thunderstorm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. outskirt outsmart Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language