buoy·an·cy | \ˈbȯi-ən(t)-sē, 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.
See More

Recent Examples on the Web

Located near Union Square, Spiderbands offers classes in which bungee cords and handles supply aerial suspension, buoyancy and resistance as students kick, push up, sprint and squat their way to a tighter tomorrow. New York Times, "The Resistance," 23 May 2018 The men, who are both in their 50s, were just outside Padanaram Harbor when their 15-to-18-foot open boat that dates to the 1960s suddenly took on water and lost buoyancy around 1:30 p.m., said Dartmouth Harbormaster Steve Melo. Elise Takahama, BostonGlobe.com, "Two men on fishing trip rescued after boat sinks in Dartmouth harbor," 25 June 2018 When the air pocket ran out, Graham used her legs as antennae, probing her feet around the pitch-black sump to feel for the next pocket of buoyancy ahead of her. Joshua Hydeman, National Geographic, "One of the Deepest Caves in the World is Even Bigger Than We Thought," 7 June 2018 An ancient Greek scientist named Archimedes discovered this principle of buoyancy. Svenja Lohner, Scientific American, "Floating with a Swim Bladder," 5 July 2018 The same goes for having your regulator and buoyancy compensator checked and repaired, if necessary. Steve Waters, miamiherald, "Florida’s annual two-day lobster miniseason coming soon. Here's what you need to know," 6 July 2018 For the robustness of Cole’s sound, clarity of his touch and buoyancy of his approach to rhythm were thoroughly intact. Howard Reich, chicagotribune.com, "Gershwin master Kevin Cole reclaims the piano after surgery," 1 July 2018 Parliament’s buoyancy comes from a contrast between highs and lows. Hua Hsu, The New Yorker, "How George Clinton Made Funk a World View," 9 July 2017 Once the panic gives way, there is calm in the rocking lull of water, an acceptance of buoyancy and the gift of a struggle removed. Chicago Tribune, chicagotribune.com, "Algren Award runner-up: "Fluid Mechanics" by Mabel Yu," 2 June 2018

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.

See More

First Known Use of buoyancy

1713, in the meaning defined at sense 1a

History and Etymology for buoyancy

see buoy entry 1

Keep scrolling for more

Learn More about buoyancy

Dictionary Entries near buoyancy





buoyancy tank


buoyant force

Statistics for buoyancy

Last Updated

5 Sep 2018

Look-up Popularity

Time Traveler for buoyancy

The first known use of buoyancy was in 1713

See more words from the same year

Keep scrolling for more

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, 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.

Keep scrolling for more

More from Merriam-Webster on buoyancy

Spanish Central: Translation of buoyancy

Nglish: Translation of buoyancy for Spanish Speakers

Britannica English: Translation of buoyancy for Arabic Speakers

Britannica.com: Encyclopedia article about buoyancy

Comments on buoyancy

What made you want to look up buoyancy? Please tell us where you read or heard it (including the quote, if possible).


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!