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[boi-uh nt, boo-yuh nt] /ˈbɔɪ ənt, ˈbu yənt/
tending to float in a fluid.
capable of keeping a body afloat, as a liquid.
not easily depressed; cheerful.
cheering or invigorating.
Origin of buoyant
1570-80; buoy + -ant
Related forms
buoyantly, adverb
nonbuoyant, adjective
nonbuoyantly, adverb
unbuoyant, adjective
unbuoyantly, adverb
3. happy, lighthearted, breezy, jaunty, sunny. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for buoyant
Contemporary Examples
Historical Examples
  • There would be a much greater amount sent out, though, if it were all buoyant.

    Lost in the Wilds of Brazil James H. Foster
  • I breathed freely, and my form seemed to expand itself with buoyant life.

    Philothea Lydia Maria Child
  • But the stranger, who had a buoyant and commanding personality, didn't seem to mind his objections.

  • Light and buoyant as the child was, her tightened clasp had begun to tell on him.

    Malbone Thomas Wentworth Higginson
  • He was imprisoned on account of his enthusiastic and chivalrous loyalty; but no dungeon could subdue his buoyant spirit.

British Dictionary definitions for buoyant


able to float in or rise to the surface of a liquid
(of a liquid or gas) able to keep a body afloat or cause it to rise
cheerful or resilient
Word Origin
C16: probably from Spanish boyante, from boyar to float, from boya buoy, ultimately of Germanic origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for buoyant

1570s, perhaps from Spanish boyante, present participle of boyar "to float," from boya "buoy," from Dutch boei (see buoy (n.)). Of personalities, etc., from c.1748. Related: Buoyantly.

Online Etymology Dictionary, © 2010 Douglas Harper
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