1. floating markers anchored in water to indicate channels, hazards, or mooring spots
Usage: nautical

1. to keep afloat or support
2. to lift the spirits of; encourage

Examples

• The harbor master placed red buoys to mark the dangerous rocks.
• Sailors rely on buoys to navigate safely through the channel.
• The life jacket buoys the swimmer in deep water.
• Her optimism buoys the entire team during difficult times.
• The cork buoys the fishing line at the surface.
• Good news from home buoys his spirits while he’s away.
• Green buoys indicate the starboard side of the shipping lane.