Definitions of buoy

  1. To keep afloat in a fluid; usually with up; to mark with floats to indicate a channel; to support; as, to buoy up one's hope.
  2. To support or sustain; to preserve from sinking into ruin or despondency.
  3. To fix buoys to; to mark by a buoy or by buoys; as, to buoy an anchor; to buoy or buoy off a channel.
  4. To keep from sinking in a fluid, as in water or air; to keep afloat; - with up.
  5. To fix buoys or marks: to keep afloat, bear up, or sustain.
  6. To keep afloat; sustain.
  7. To keep afloat; support; mark with buoys.
  8. To float; to rise like a buoy.
  9. keep afloat; " The life vest buoyed him up"
  10. To keep afloat; to bear up; to support; to sustain; to place buoys; to float.
  11. bright- colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards
  12. 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.
  13. A floating body moored to the bottom to show the position of rocks or shoals beneath the water, or to mark a channel; a device to support a person in the water.
  14. A floating cask or light piece of wood fastened by a rope or chain to indicate shoals, the position of a ship's anchor, etc.
  15. A cask or watertight vessel which floats on the water to mark the situation of something below.
  16. A float moored, as on a rock or shoal, for a guide to navigators.
  17. An empty cask, or a small structure of wood, made for floating on the water, to point out shallows or rocks & c.; life- buoys articles kept in ships to be thrown into the water when any person falls overboard to keep him afloat; afloat.