Definition of life jacket noun from the Oxford Advanced Learner's Dictionary

 

life jacket

 noun
noun
BrE BrE//ˈlaɪf dʒækɪt//
 
; NAmE NAmE//ˈlaɪf dʒækɪt//
 
(North American English also life vest) Water sports
 
jump to other results
a jacket without sleeves, that can be filled with air, designed to help you float if you fall in water See related entries: Water sports
See the Oxford Advanced American Dictionary entry: life jacket