Definition of "head-rest" [head-rest]

• A rest or support of any kind for the head; specifically, in photography, an adjustable apparatus, generally a metallic skeleton frame, placed behind the sitter to steady and support his head during the taking of his portrait. (noun)

The Century Dictionary (Public Domain)

• "Martinez stretched his right arm across the passenger's head-rest and turned."
• "Moveable curtains and head-rest covers signal "business class"—the airline can sell as many business-class tickets, usually at 50% higher than a regular coach ticket, as it can, then adjust the curtains and headrests for each flight depending on bookings."
• "Toyota Kirloskar Motor Ltd. The seats of the sedan are ergonomically sound, and boast an integrated head-rest."