Definitions from WordNet
Definitions from the Web
Noun: A life jacket is a buoyancy aid or personal flotation device designed to keep a person afloat in water.
Sample sentence: It is important to wear a life jacket while boating to ensure safety in case of an emergency.
Noun: In popular usage, a life jacket can also refer to a sleeveless, padded jacket worn by people engaged in water sports.
Sample sentence: He put on his life jacket before going water skiing to protect himself from potential injuries.
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