/ Dictionary / Index S sleeping car: Meaning and Definition of Find definitions for: sleep'ing car" Pronunciation: [key] a railroad car fitted with berths, compartments, bedrooms, or drawing rooms for passengers to sleep in. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sleeping Beauty sleeping chair 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