seat belt; seatbelt; safety belt
Refers to the safety belt used in a car, airplane, or other seat. Common verbs include シートベルトを締める and シートベルトを着用する.
When you get in the car, please fasten your seat belt first.
Please keep your seat belt fastened until the plane lands.
Please fasten your seat belt before you start driving.
You must wear your seat belt even in the back seat.
Please do not unfasten your seat belt until the plane has come to a complete stop.
Make sure children wear their seat belts properly too.