Buoy"ant (?), a. [From Buoy, v. t. & i.]
1.
Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury.
"
Buoyant on the flood."
Pope.
2.
Bearing up, as a fluid; sustaining another body by being specifically heavier.
The water under me was buoyant.
Dryden.
3.
Light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits.
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Buoy"ant*ly, adv.
© Webster 1913.