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

In the meantime, the Bureau of Reclamation used buoys to mark the submerged hazard in the water. —Stephanie Murray, AZCentral.com, 7 Aug. 2025

Titov, who helped build the models used by forecasters who issue warnings from the National Tsunami Warning Centers in Hawaii and Alaska, said the models rely on seismic data and the network of more than 70 DART buoys along the Pacific Rim, which sense pressure changes. —Evan Bush, NBC news, 31 July 2025

Verb

Hong Kong was buoyed by Tencent, which rose 1.64% ahead of a mobile game release, and by gains in online entertainment stocks, including Kuaishou (up 2.79%), Bilibili (up 2.94%), and Tencent Music Entertainment (up 2.61%). —Brendan Ahern, Forbes.com, 5 Aug. 2025

Apple’s stock, while buoyed after the earnings beat, has fallen 16% year-to-date, underperforming the broader S&P 500. —Geoff Colvin, Fortune, 31 July 2025

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