/ Dictionary / Index S sleeping chair: Meaning and Definition of Find definitions for: sleep'ing chair" Pronunciation: [key] a chair of the 17th century, having a high back, usually adjustable, with deep wings of the same height. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sleeping car sleeping partner 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