/ Dictionary / Index S sleep sofa: Meaning and Definition of Find definitions for: sleep' so"fa Pronunciation: [key] a sofa that can be used as a bed; sofa bed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sleepshirt sleep-terror disorder Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language