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 Long-lived, intense thunderstorms are most probable when there is an optimum balance between buoyancy and shear. Washington Post, "Threat of thunderstorms with damaging winds in D.C. area on Sunday," 27 Mar. 2021 The Excursion 5 features three air chambers for extra buoyancy, and an I-Beam floor construction adds rigidity. Jennifer Leman, Popular Mechanics, "How That Massive Ship Got Stuck in the Suez Canal—and Why Nobody Can Get It Out," 25 Mar. 2021 The life vest provides a minimum of 32-pounds of buoyancy. Outdoor Life, "Stay Comfortable and Safe on the Water with the Best Fishing Life Vest," 16 Mar. 2021 The Excursion 5 features three air chambers for extra buoyancy, and an I-Beam floor construction adds rigidity. Kyle Mizokami, Popular Mechanics, "Why Did the USS Thresher Sink? New Declassified Documents Reveal the Truth," 17 Mar. 2021 But last spring, after six years of relative stability, Sapphire’s buoyancy problems returned. San Diego Union-Tribune, "Column: How a Chula Vista sea turtle was saved by a wetsuit," 13 Mar. 2021 Weinbach Schlossburg Riesling 2017 ($50)—The aromatics in this fine three-year-old Grand Cru Alsatian Riesling are complex, and the 13.5% alcohol gives it a lively buoyancy along with the zesty acids. John Mariani, Forbes, "Wines For Late Winter And Maybe An Early Spring," 3 Mar. 2021 Available at just $595 for a queen-size bed, this Casper mattress strikes a balance between the sinking feeling of traditional memory foam and the buoyancy of latex. Better Homes & Gardens, "10 Affordable Mattresses Backed by Thousands of Reviews," 22 Jan. 2021 Very high-end watches are one reason for the surprising buoyancy of luxury watches this year. Marc Bain, Quartz, "Sales of super expensive watches are bouncing back fast," 17 Dec. 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

10 Apr 2021

Cite this Entry

“Buoyancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/buoyancy. Accessed 18 Apr. 2021.

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More Definitions for buoyancy



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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