A headrest is the padded cushion attached to your car seat just behind your head. The headrest protects your head and neck from being jerked backward during an accident.

Your head is supported and protected by a car's headrest — you're less likely to sustain the neck injury known as whiplash with a well-designed headrest. Headrests or head restraints have been required in cars since the late 1960's, when they became a mandatory safety feature in new automobiles. While the driver rarely actually rests her head, her front seat passenger might tip his seat back on a long trip to get full use of his headrest.

Definitions of headrest
  1. noun
    a rest for the head
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    type of:
    a support on which things can be put
  2. noun
    a cushion attached to the top of the back of an automobile's seat to prevent whiplash
    synonyms: head restraint
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    type of:
    a soft bag filled with air or a mass of padding such as feathers or foam rubber etc.
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