buoy Definition

an anchored float serving as a navigation mark, to show reefs or other hazards, or for mooring.

Using buoy: Examples

Take a moment to familiarize yourself with how "buoy" can be used in various situations through the following examples!

  • Example

    The buoy marks the entrance to the harbor.

  • Example

    The ship was tied to the buoy.

  • Example

    The buoy is used to warn boats of dangerous rocks.

  • Example

    The fishermen checked their nets by the buoy.

buoy Synonyms and Antonyms

Synonyms for buoy

Phrases with buoy

  • a floating device thrown to a person in the water to keep them afloat and prevent drowning


    The lifeguard threw a life buoy to the struggling swimmer.

  • buoy up

    to support or uplift someone's spirits


    Her words buoyed him up when he was feeling down.

  • to help someone continue or make progress with something


    She was buoyed along by her friends' encouragement.

Origins of buoy

from Middle Dutch 'boeye', meaning 'signal'


Summary: buoy in Brief

A 'buoy' [boi] is an anchored float that serves as a navigation mark, warning of hazards or for mooring. It is commonly used to mark the entrance to harbors and warn boats of dangerous rocks. 'Buoy' extends into phrases like 'life buoy,' which is a floating device to prevent drowning, and 'buoy up,' which means to uplift someone's spirits.