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. — Buoy″ant‐ly, adv.