/ Dictionary / Index S sleep learning: Meaning and Definition of Find definitions for: sleep' learn"ing Pronunciation: [key] the act or process of learning during sleep by listening to recordings repeatedly. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sleeping sickness sleepless Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language