a floating object on the top of the sea, used for directing ships and warning them of possible danger
Don’t steer the boat near those buoys.
There are rocks underneath the water.
The bright red buoy bobbed on the water's surface, marking the safe passage for boats in the harbor.
After a tough day at work, his favorite music served as a mental buoy, lifting his spirits and helping him relax.
The company's successful product launch acted as a financial buoy, boosting its revenue and profitability for the year.
