Headrest (noun)

A device or cushion attached to the back of a seat, especially in a vehicle or plane, for supporting the head and neck.

Origin:

The term 'headrest' is of uncertain origin, but likely comes from the idea of a rest or support for the head.

Examples:

1. She adjusted the headrest for maximum comfort during the long flight.
2. The car's headrests were adjustable to fit different heights.
3. Many passengers appreciated the comfortable headrests on the train.
4. The headrest in the dentist chair provided support during the lengthy procedure.
5. He leaned his head back on the headrest and fell asleep during the drive.