From Longman Dictionary of Contemporary Englishseat beltˈseat belt ●●○ (also safety belt) noun [countable] TTCTTAa belt attached to the seat of a car or plane which you fasten around yourself for protection in an accident
Examples from the Corpus
seat belt• As it lifted from the Luftwaffe fighter base outside Berlin, Schellenberg undid his seat belt and reached for his briefcase.• I was floating, held by my seat belt.• The sign comes on and Paul does up John's seat belt.• The basic idea was that using the seat belt takes time, to which the driver attaches a value. 