Word forms: (regular plural) seat belt tensioners
(Automotive engineering: Vehicle components, Bodywork, controls, and accessories) A seat belt tensioner is a device in a vehicle that pulls a seat belt tight if there is a sudden movement or stop. ▶ seat belt
⇒ Standard safety features include a driver's air bag and seat belt tensioners. ⇒ A seat belt tensioner considerably increases the passenger protection afforded by the safety belts in the
case of an accident. ⇒ Seat belt tensioners work in conjunction with the air bags by maintaining proper occupant position, and
reducing the amount of work the air bags have to do.
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