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English definition of “buoy”

buoy

verb [T] (FLOAT)    /bɔɪ/ US  /ˈbuː.i/
to prevent someone or something from sinking: The very salty water buoyed her (up) as she swam.Staying afloat, capsizing and sinkingPhysical supports and supportingArches, columns and beams
(Definition of buoy verb (FLOAT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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