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

The first is observations, which include measurements of rainfall, near-surface temperature, wind speed and other weather variables collected from weather stations, radars, buoys and satellites. — Chanh Kieu, Washington Post, 2 Oct. 2026

Waves of 16 feet or more have been reported by buoys off the Jersey Shore and southern New England. — Kyle Reiman, ABC News, 26 Sep. 2026

Verb

The long drives were buoyed by bold play calling, with the Broncos going 4-for-4 on fourth downs, including a trick play in which Madsen pretended to fumble the ball before connecting with sophomore receiver AJ Jones for 7 yards and a first down. — Shaun Goodwin, Idaho Statesman, 11 Oct. 2026

San Francisco has been buoyed by quarterback Brock Purdy, who is off to the best start of his career and has rocketed up MVP betting odds since the season began. — Chris Biderman, Sacbee.com, 9 Oct. 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
• cestui
• 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