01 a. Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury.
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1.
Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury.
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2.
Bearing up, as a fluid; sustaining another body by being specifically heavier.“The water under me was buoyant.” — Dryden.
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3.
Light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits.