Definition of buoy noun from the Oxford Advanced Learner's Dictionary



BrE BrE//bɔɪ//
; NAmE NAmE//bɔɪ//
, also NAmE//ˈbuːi//
Coastlines and the sea
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an object which floats on the sea or a river to mark the places where it is dangerous and where it is safe for boats to go see also lifebuoy See related entries: Coastlines and the sea Word OriginMiddle English: probably from Middle Dutch boye, boeie, from a Germanic base meaning ‘signal’. The verb is from Spanish boyar ‘to float’, from boya ‘buoy’.
See the Oxford Advanced American Dictionary entry: buoy

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