pretensioner

noun

pre·​ten·​sion·​er ˌprē-ˈten(t)-sh(ə-)nər How to pronounce pretensioner (audio)
plural pretensioners
: a mechanism that tightens and locks automobile seatbelts in place in the event of a crash or hard braking
Pretensioners, like air bags, rely on a small explosive charge to tighten belts fast enough to reduce injuries even in high-speed crashes. Mark Phelan

Word History

First Known Use

1979, in the meaning defined above

Time Traveler
The first known use of pretensioner was in 1979

Dictionary Entries Near pretensioner

Cite this Entry

“Pretensioner.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pretensioner. Accessed 29 Nov. 2022.

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