A sleepin caur or sleeping car or sleeper (eften wagon-lit) is a railwey passenger caur that can accommodate aw its passengers in beds o ane kynd or anither, primarily for the purpose o makin nichttime traivel mair restful. Theodore Tuttle Woodruff wis the American inventor o the sleepin caur.
The first sic cars saw sporadic uise on American railroads in the 1830s. Thay coud be configured for coach seating during the day. Some o the mair luxurious types hae private rooms (fully an solidly enclosed rooms that are nae shared wi strangers).