bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards
source: WordNet 3.0
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.
source: Webster 1913
verb
float on the surface of water
source: WordNet 3.0
keep afloat
The life vest buoyed him up.
source: WordNet 3.0
mark with a buoy
source: WordNet 3.0
To keep from sinking in a fluid, as in water or air; to keep afloat; -- with up.
