See life buoy for more life·buoyBrE /ˈlaɪfbɔɪ/ 🔊NAmE /ˈlaɪfbɔɪ/ 🔊, also /ˈlaɪfbuːi/ 🔊 nouna piece of material that floats well, used to rescue sb who has fallen into water, by keeping them above water 救生带；救生圈