Definitions

1. noun

A floating device, especially one that marks the position of a reef or a similar underwater hazard.

“The sailor carefully navigated his boat around the buoy warning of shallow waters.”

2. verb

To make (something) buoyant or able to float.

“The addition of gas to the balloon buoyed it up, allowing it to rise high into the air.”

3. verb

To give (someone) hope or confidence.

“The news of the rescue operation buoyed the family’s spirits, giving them hope that their loved one would be found.”