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Definition of Buoy
1. Noun. Bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards.
Specialized synonyms: Acoustic Buoy, Can, Can Buoy, Conical Buoy, Nun, Nun Buoy, Spar Buoy
2. Verb. Float on the surface of water.
3. Verb. Keep afloat. "The life vest buoyed him up"
4. Verb. Mark with a buoy.
Definition of Buoy
1. n. A float; esp. a floating object moored to the bottom, to mark a channel or to point out the position of something beneath the water, as an anchor, shoal, rock, etc.
2. v. t. To keep from sinking in a fluid, as in water or air; to keep afloat; -- with up.
3. v. i. To float; to rise like a buoy.
Definition of Buoy
1. Noun. (nautical) A float moored in water to mark a location, warn of danger, or indicate a navigational channel. ¹
2. Noun. A life-buoy. ¹
3. Verb. (transitive) To keep afloat or aloft. ¹
4. Verb. (transitive) To support or maintain at a high level. ¹
5. Verb. (transitive) To mark with a buoy. ¹
¹ Source: wiktionary.com
Definition of Buoy
1. to mark with a buoy (a warning float) [v -ED, -ING, -S]