1 (used about a material) floating or able to float （指材料）有浮力

2 happy and confident 兴高采烈: The team were in buoyant mood after their win. 获胜后队员们欣喜若狂。

3 (used about prices, business activity, etc) staying at a high level or increasing, so that people make more money （指价格、商业活动等）保持高水平或增长（而能获利）: Despite the recession, the property market remained buoyant. 虽然经济不景气，但地产市场仍然畅旺。 ➔buoyancy /-ənsi ||; -ənsɪ/ noun [U]: the buoyancy of the German economy 德国经济的蓬勃发展