buoy·​an·​cy | \ ˈbȯi-ən(t)-sē How to pronounce buoyancy (audio) , ˈbü-yən(t)- \

Definition of buoyancy

1a : 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.
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Recent Examples on the Web Its recent buoyancy arises from relatively robust GDP growth through early this year and its status as the world's reserve currency. Shawn Tully, Fortune, "The biggest economic threat facing the next administration: A weak dollar," 11 Oct. 2020 The song's sense of buoyancy and lift are head-smacking from its opening chords, and simply float higher and higher throughout the song's relentlessly chugging four-minute runtime. Andrew Unterberger, Billboard, "Forever No. 1: Van Halen's 'Jump'," 7 Oct. 2020 This personal flotation device (PFD) is sleeker than most while still providing enough buoyancy and insulation from the cold for even large German shepherds. Sal Vaglica, WSJ, "How to Bring Your Dog on Any Fall Adventure—From Hiking to a Hotel Stay," 2 Oct. 2020 The young female Hua Mulan (played by Liu Yifei) no longer moves with a cartoon’s fantastic fluid quickness or magical buoyancy but is a gravity-defying rule-breaking figure from China’s sixth-century folklore. Armond White, National Review, "Disney’s Mulan Virus," 9 Sep. 2020 Yes, there is an upward buoyancy force on the brick. Rhett Allain, Wired, "Let's Calculate How Many Balloons David Blaine Needed to Float," 9 Sep. 2020 The researchers created a model to explain how the effects of buoyancy are mirrored on the underside of the fluid. Edd Gent, Science | AAAS, "Watch levitating upside-down boats flip the law of buoyancy," 2 Sep. 2020 As research continues, Serra and his colleagues hope to factor in the effects of wind and buoyancy, thus increasing the predictions' accuracy. Scott Hershberger, Scientific American, "Algorithm Aids Search for Those Lost at Sea," 18 Aug. 2020 It is written in the most glorious prose, its beat and buoyancy delivered by Dominic Hoffman. Katherine A. Powers, Star Tribune, "Audiobooks: Three great audiobooks for your daily walk," 28 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'buoyancy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of buoyancy

1713, in the meaning defined at sense 1a

History and Etymology for buoyancy

see buoy entry 1

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Time Traveler for buoyancy

Time Traveler

The first known use of buoyancy was in 1713

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Statistics for buoyancy

Last Updated

18 Oct 2020

Cite this Entry

“Buoyancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/buoyancy. Accessed 25 Oct. 2020.

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More Definitions for buoyancy


How to pronounce buoyancy (audio)

English Language Learners Definition of buoyancy

: the ability of an object to float in water or air
: the power of a liquid to make someone or something float
: the ability of someone or something to continue to be happy, strong, etc., through difficult times


buoy·​an·​cy | \ ˈbȯi-ən-sē How to pronounce buoyancy (audio) , ˈbü-yən- \

Kids Definition of buoyancy

1 : the power of rising and floating (as on water or in air) Cork has buoyancy in water.
2 : the power of a liquid to hold up a floating body Seawater has buoyancy.

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