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Synonyms

seat belt

American  
Or seatbelt

noun

  1. a belt or strap in an automobile, airplane, etc., fastened around or sometimes diagonally across the midsection to keep the person safely secured, as during a sudden stop.

seat belt British  

noun

  1. Also called: safety belt.  a belt or strap worn in a vehicle to restrain forward motion in the event of a collision

  2. a similar belt or strap worn in an aircraft at takeoff and landing and in rough weather

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of seat belt

First recorded in 1945–50

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To remedy the issue, Rivian released an over-the-air software update that will automatically detect seat belt misuse.

From Los Angeles Times • Dec. 3, 2025

Rivian is recalling 34,824 vehicles to fix a damaged seat belt pretensioner cable.

From Barron's • Dec. 3, 2025

You are in the passenger seat with no seat belt, and the dashboard lights are blinking like they’re trying to tell you something in Morse code, which you never learned.

From MarketWatch • Dec. 2, 2025

Then, once the athletes are sitting comfortably, he recommends they use sanitizing wipes to clean any areas they might touch: the seat belt, arm rests, air nozzle.

From The Wall Street Journal • Nov. 5, 2025

I scoot even further, straining against the seat belt.

From "I Can Make This Promise" by Christine Day

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.