Buoyancy

noun

noun ·3 syllables ·Moderate ·College level

Definitions

Noun
  1. 1
    The upward force on a body immersed or partly immersed in a fluid. countable, uncountable
  2. 2
    irrepressible liveliness and good spirit wordnet
  3. 3
    The ability of an object to stay afloat in a fluid. countable, uncountable
  4. 4
    the tendency to float in water or other liquid wordnet
  5. 5
    Resilience or cheerfulness. broadly, countable, uncountable

    "With how much lighter a step, with how much brighter an eye, did Francesca wander through the forest, even in the last desolation of autumn, than she did in all the bloom and buoyancy of spring!"

Show 2 more definitions
  1. 6
    the property of something weightless and insubstantial wordnet
  2. 7
    cheerfulness that bubbles to the surface wordnet

Synonyms

All synonyms
airinessadaptabilityairinessanimationascentbounce

Example

More examples

"Astronauts prepare for spacewalks by practicing their tasks underwater in a giant pool called NASA's Neutral Buoyancy Laboratory."

Etymology

From buoyant + -cy or buoy + -ancy.

Related phrases

buoyancy aidbuoyancy tankcenter of buoyancycentre of buoyancyreserve buoyancyarchimedes principlebuoy up

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.