- a buoyant device for saving a person from drowning by keeping the body afloat, as a ring or sleeveless jacket of canvas-covered cork or kapok
- Chiefly Brit. blackjack (sense )
See life preserver in American Heritage Dictionary 4
- A buoyant device, usually in the shape of a ring, belt, or jacket, designed to keep a person afloat in the water.
- Chiefly British A weapon, such as a blackjack.
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