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1. Oxford American Dictionary

   life preserver

   • IPA[laɪf prəˈzərvər]

   美式

   • n.
     a device made of buoyant or inflatable material, such as a life jacket, to keep someone afloat in water.；a short club with a heavily weighted end, used as a weapon; a blackjack.

   • noun: life preserver, plural noun: life preservers