buoyancy

noun

buoy·​an·​cy ˈbȯi-ən(t)-sē 

ˈbü-yən(t)-

1

a

: the tendency of a body to float or to rise when submerged in a fluid

testing an object's buoyancy

b

chemistry : the power of a fluid to exert an upward force on a body placed in it

the buoyancy of water

also : the upward force exerted

2

: the ability to recover quickly from depression or discouragement : resilience

his buoyancy of spirit

3

: the property of maintaining a satisfactorily high level (as of prices or economic activity)

betting that the economy will maintain its buoyancy

Examples of buoyancy in a Sentence

the natural buoyancy of cork

The swimmer is supported by the water's buoyancy.

We hope that the economy will maintain its buoyancy.

Recent Examples on the Web

Or she could be saved by the relative buoyancy of the Biden-era U.S. economy — the envy of the world. —Dave Lawler, Axios, 23 Oct. 2024

Upon resurfacing, it was discovered the platform malfunction was caused by an issue with the variable ballast tank, which controlled the submersible’s buoyancy. —Ray Sanchez and Graham Hurley, CNN, 22 Sep. 2024

While that swallowtail languished in my board bag, the wide, early-rise nose of the Transition Finder provided unbelievable buoyancy on hip-deep tree runs, mini-truck-sized pillow poppers, and sidecountry sojourns. —Drew Zieff, Outside Online, 26 Sep. 2024

The buoyancy of the water takes the extra weight off your joints. —Cory Martin, Verywell Health, 1 Oct. 2024

Word History

Etymology

see buoy entry 1

First Known Use

1713, in the meaning defined at sense 1a

Kids Definition

buoyancy

noun

buoy·​an·​cy ˈbȯi-ən-sē 

ˈbü-yən-

1

: the tendency of a body to float or to rise when in a fluid

the buoyancy of a cork in water

2

: the power of a fluid to put an upward force on a body placed in it

the buoyancy of seawater