1 [C] a period of doing a particular activity （从事某活动的）一段时间: The whole tape was recorded in one session. 整卷录音带都是在一节时间内录成的。She has a session at the gym every week. 她每星期去健身房做一回运动。

2 [C,U] a formal meeting or series of meetings of a court of law, parliament, etc （法庭的）开庭；（议会等的）会议