(adj) characterized by liveliness and lightheartedness, Syn. perky, chirpy, Example:buoyant spirits; his quick wit and chirpy humor; looking bright and well and chirpy; a perky little widow in her 70s
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. [ 1913 Webster ]
2. Bearing up, as a fluid; sustaining another body by being specifically heavier. [ 1913 Webster ]
The water under me was buoyant. Dryden. [ 1913 Webster ]