vi to float; to rise like a buoy.
2. buoy ·vt to support or sustain; to preserve from sinking into ruin or despondency.
3. buoy ·vt to keep from sinking in a fluid, as in water or air; to keep afloat;
with up.
4. buoy ·vt to fix buoys to; to mark by a buoy or by buoys; as, to buoy an anchor; to buoy or buoy off a channel.
5. buoy ·noun 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.