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

Drones and buoy cameras recorded live views of the on-target splashdown. —Stephen Clark, ArsTechnica, 23 May 2026

The fishery uses tens of thousands of vertical lines that connect traps on the seafloor to surface buoys, creating entanglement hazards for whales migrating and feeding along the coast. —ABC News, 20 May 2026

Verb

The always eminently watchable Rebecca Hall (The Man I Love, TV’s The Beauty) both anchors and buoys the tonally irregular but consistently thoughtful and compelling sci-fi comedy-drama The End of It, a feature debut for Catalan writer-director Maria Martinez Bayona. —Leslie Felperin, HollywoodReporter, 24 May 2026

Even as the film transforms into a murky crime saga defined by its striking, gloomy environment, it is buoyed by the dramatic radiance of this tragic contradiction, born of decades (and centuries) of the Kinnar’s survival mechanism. —Siddhant Adlakha, Variety, 20 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
• 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