1. (

• buoy

) bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards ;

1. (

• buoy

) float on the surface of water ;

2. (

• buoy ,
• buoy_up

) keep afloat; "The life vest buoyed him up" ;

3. (

• buoy

) mark with a buoy ;