Definition of "buoyancy" []

• The tendency or capacity to remain afloat in a liquid or rise in air or gas. (noun)
• The upward force that a fluid exerts on an object less dense than itself. (noun)
• Ability to recover quickly from setbacks; resilience. (noun)
• Lightness of spirit; cheerfulness. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Analysis shows that this buoyancy is attributable mainly to an improvement in our manufacturing industries."
• "The aeroplane does; and the instant its propellers cease to revolve, its buoyancy is lost."
• "To explain the dive I have to show you how to remove the buoyancy from a submarine."