buoy
Plural
buoys
1
a floating object anchored in a body of water, typically used for navigation, marking hazards, or for indicating the location of something such as a submarine cable
- The sailors used the buoy to mark the safe entry point into the harbor.
- A bright red buoy warned boats of a submerged rock in the area.
- The captain steered the boat carefully around the buoy marking the shallow reef.
- At the beach, a buoy indicated the boundary of the swimming area.
- The buoy was part of a larger system used to track ocean currents.