WordReference Random House Learner's Dictionary of American English © 2017
ˈlife ˌjack•et, n. [countable]
  • Naval Termsa life preserver in the form of a sleeveless jacket.
  • Also called  ˈlife ˌvest. 
    WordReference Random House Unabridged Dictionary of American English © 2017
    life jack′et, 
  • Nautical, Naval Termsa sleeveless jacket of buoyant or inflatable construction, for supporting the wearer in deep water and preventing drowning. Also called  life vest;
     [Brit.,] air jacket. 
    • 1865–70


    Collins Concise English Dictionary © HarperCollins Publishers::

    life jacket n
    1. an inflatable sleeveless jacket worn to keep a person afloat when in danger of drowning



    'life jacket' also found in these entries:
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