1. a safety device in a vehicle that inflates rapidly during a collision to protect passengers from injury

Examples

• The airbag deployed when the car hit the tree.
• Modern cars have multiple airbags for driver and passenger protection.
• She was grateful the airbag prevented serious injury during the accident.
• The mechanic checked that all airbags were functioning properly.
• Airbags have saved thousands of lives since their introduction.
• Children should sit in the back seat away from airbags.