buoy: Meaning and Definition of

bu•oy

1. a distinctively shaped and marked float, sometimes carrying a signal or signals, anchored to mark a channel, anchorage, navigational hazard, etc., or to provide a mooring place away from the shore.
2. a life buoy.

1. to keep afloat or support by or as if by a life buoy; keep from sinking (often fol. by up): The life jacket buoyed her up until help arrived.
2. to mark with a buoy or buoys.
3. to sustain or encourage (often fol. by up): Her courage was buoyed by the doctor's assurances.

1. to float or rise by reason of lightness.