Definition

Noun: A safety device in a vehicle, specifically a padded support attached to the top of a seat's backrest. Its primary function is to limit the rearward movement of an occupant's head during a collision, thereby helping to prevent or reduce neck injuries such as whiplash.

Usage

The term "head restraint" is used to describe this specific automotive safety component. It is a standard feature in modern vehicles. - All new cars are required to have adjustable head restraints for the front seats. - For maximum safety, you should adjust the head restraint so it is level with the top of your head. - The police report noted that the driver's whiplash injury was less severe due to the properly positioned head restraint.

Advanced Usage

• "Active head restraint": A more advanced type of head restraint that moves dynamically in a crash to meet the occupant's head sooner, offering enhanced protection.
  • The vehicle's safety features include pyrotechnic pre-tensioners and active head restraints.

Variants and Related Words

• Headrest (noun): A common, informal synonym for "head restraint." While often used interchangeably in everyday language, in strict technical contexts, "head restraint" emphasizes the safety function, whereas "headrest" can sometimes imply mere comfort.
  • The leather headrest was stained.
• Integrated head restraint: A head restraint that is built into the seat structure rather than being a separate, adjustable unit.
  • The sports car's bucket seats featured integrated head restraints.

Synonyms

• Headrest
• Seat head support

Notes on Meaning

The term specifically refers to the safety device designed to prevent injury. It is distinct from a simple comfort pillow or a headrest on a piece of furniture (e.g., a dentist's chair), which may not be engineered for crash protection. The key concept is its role in restraining the head's movement during sudden deceleration.

Noun

1. a cushion attached to the top of the back of an automobile's seat to prevent whiplash