verb · to relax completely or empty one's mind

工作累了，我喜欢去海边坐着放空。

verb · to sell a security or commodity short in financial markets

他在股市高位时选择了放空。

verb · to travel without cargo or passengers, particularly regarding commercial vehicles or deadheading

由于找不到回程货源，这辆货车只好放空回来。