seat belt
US /ˈsiːt belt/
UK /ˈsiːt belt/

1.
Sicherheitsgurt, Anschnallgurt
a strap or harness designed to secure a person in a seat, especially in a vehicle or aircraft, to prevent injury in the event of a collision or sudden stop
:
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Always fasten your seat belt before driving.
Schnallen Sie sich immer mit dem Sicherheitsgurt an, bevor Sie fahren.
•
The flight attendant reminded everyone to keep their seat belts fastened during turbulence.
Die Flugbegleiterin erinnerte alle daran, ihre Sicherheitsgurte während Turbulenzen angelegt zu lassen.