buoyant

adjective

buoy·​ant ˈbȯi-ənt 

ˈbü-yənt

: having buoyancy

Warm air is more buoyant than cool air.

: such as

a

: capable of floating

Cork is naturally buoyant.

b

: cheerful, gay

in a buoyant mood

c

: capable of maintaining a satisfactorily high level

a buoyant economy

buoyantly adverb

Synonyms of buoyant

• cheerful
• optimistic
• bright

Examples of buoyant in a Sentence

Warm air is more buoyant than cool air.

The actors were buoyant as they prepared for the evening's performance.

Recent Examples on the Web

According to the researchers, the tubes remain buoyant even in turbulent water similar to rough sea conditions. —Sujita Sinha, Interesting Engineering, 28 Jan. 2026

The firm’s asset and wealth management division should also see gains as stock market levels remained buoyant in the quarter. —Hugh Son, CNBC, 15 Jan. 2026

The old immigrants are likely to remain—in the manner of the occasional Wasp legatee (Wagner, Lindsay) who poked in during the buoyant sixties—more visitors to wars over civic power than victors in them. —Adam Gopnik, New Yorker, 12 Jan. 2026

The show premiered over Thanksgiving weekend, when people were tired and full and bored (and probably also horny), and countered our world’s unceasing badness with its world’s buoyant sweetness. —Fran Hoepfner, Vulture, 12 Jan. 2026

Word History

Etymology

see buoy entry 1

First Known Use

1578, in the meaning defined above

Rhymes for buoyant

• clairvoyant
• flamboyant

Kids Definition

buoyant

adjective

buoy·​ant ˈbȯi-ənt 

ˈbü-yənt

1

: having buoyancy

especially : capable of floating

2

: being in a happy mood : cheerful

buoyantly adverb