buoy

1 of 2

noun

ˈbü-ē  ˈbȯi 

1

: float sense 2

especially, nautical : a floating object moored to the bottom to mark a channel or something (such as a shoal) lying under the water

swam out toward the buoy

2

: life buoy

Illustration of buoy

• buoy 1

buoy

2 of 2

verb

buoyed; buoying; buoys

transitive verb

1

: to mark by or as if by a float or buoy

buoy an anchor

2

a

: to keep afloat

a raft buoyed by empty oil drums

b

: support, uplift

… an economy buoyed by the dramatic postwar growth of industry …

—Time

3

: to raise the spirits of

—usually used with up

hope buoys him up

intransitive verb

: float

—usually used with up

They buoyed up like a cork.

Examples of buoy in a Sentence

Verb

The tax breaks should help to buoy the economy.

Recent Examples on the Web

Noun

Supercomputers ingest measurements from satellites, weather balloons, Doppler radar, lightning detection networks, buoys, surface weather stations and other measurement platforms to solve the equations that provide weather predictions. —Chris Vagasky, The Conversation, 28 Apr. 2026

Families flock to the Cape for mini-golfing, traipsing around sand dunes, comparing ice cream stands, gobbling up lobster rolls, spotting whales, and simply admiring the gray cedar shake houses adorned with colorful buoys. —Kara Williams, USA Today, 25 Apr. 2026

Verb

Wallstedt was sharp from the get-go Saturday, including buoying the Wild in killing the two first-period Avalanche power plays. —Michael Russo, New York Times, 10 May 2026

Missouri is constitutionally required to pass a balanced budget, meaning the state must continue to pull from a rainy day fund that’s been buoyed by years of pandemic-era federal relief. —Jack Harvel, Kansas City Star, 7 May 2026

Word History

Etymology

Noun and Verb

Middle English boye, probably from Middle Dutch boeye; akin to Old High German bouhhan sign — more at beacon

First Known Use

Noun

13th century, in the meaning defined at sense 1

Verb

1596, in the meaning defined at transitive sense 1

Phrases Containing buoy

• bell buoy
• breeches buoy
• life buoy

Rhymes for buoy

• chewy
• dewy
• gooey
• ennui

Kids Definition

buoy

1 of 2 noun

ˈbü-ē  ˈbȯi 

1

: a floating object anchored in a body of water to mark a channel or warn of danger

2

: life buoy

buoy

2 of 2 verb

1

: to keep from sinking : keep afloat

2

: to brighten the mood of

the news buoyed him up