- (nautical) A float moored in water to mark a location, warn of danger, or indicate a navigational channel.
- A lifebuoy.
- Dutch: boei
- French: bouée
- German: Boje
- Spanish: boya
- (transitive) To keep afloat or aloft.
- (transitive) To support or maintain at a high level.
- (transitive) To mark with a buoy.
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