1
a
: able to float
Cork is very buoyant.
a buoyant material
b
: able to cause things to float
Warm air is more buoyant than cool air.
2
: happy and confident
The actors were buoyant as they prepared for the evening's performance.
in a buoyant mood
3
: able to stay at a regular or high level
a buoyant economy/market
Cite this Entry
“Buoyant.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/buoyant. Accessed 19 Jun. 2026.
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