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

This gear stores the rope and buoy with a trap on the seafloor until an acoustic release mechanism sends the buoy to the surface. —Jason Mastrodonato, Mercury News, 4 Apr. 2025

The agency owns or operates 13 weather satellites; manages more than 200 deep-water buoys; and gathers weather and climate information from a storm of data provided by no fewer than 10,600 state, local, and federal governments, as well as universities and private companies nationwide. —Jeffrey Kluger, TIME, 13 Mar. 2025

Verb

Sophomore star Hannah Hidalgo often had buoyed the offense in the early months. —Julia Poe, Chicago Tribune, 28 Mar. 2025

Optimism among company chief financial officers dropped in the first quarter as tariff risks and uncertainty began to cloud an outlook among business executives that had been buoyed by President Donald Trump's election victory, according to a survey by two Federal Reserve banks and Duke University. —Howard Schneider, USA Today, 26 Mar. 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