life·beltBrE/ˈlaɪfbelt/NAmE/ˈlaɪfbelt/noun(BrE) alargeringmadeofmaterialthatfloatswell, thatisusedtorescuesbwhohasfallenintowater, topreventthemfromdrowning救生圈(NAmE) aspecialbeltworntohelpsbfloatinwater(使人不下沉的)救生带➡ see alsolife jacket, life preserver