headrest

[ hed-rest ]
/ ˈhɛdˌrɛst /

noun

a rest or support of any kind for the head.
Also called head restraint. a padded part at the top of the back of a seat, especially in an automobile, to protect one's head against whiplash in a collision.

Origin of headrest

First recorded in 1850–55; head + rest1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for head restraint (1 of 2)

head restraint

noun

an adjustable support for the head, attached to a car seat, to prevent the neck from being jolted backwards sharply in the event of a crash or sudden stop

British Dictionary definitions for head restraint (2 of 2)

headrest

/ (ˈhɛdˌrɛst) /

noun

a support for the head, as on a dentist's chair or car seat

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012