to not take part in a physical activity such as a dance or a game, because you are tired or injured

I'm feeling rather tired, so I think I'll sit out the next dance. 我觉得很累，所以下一首舞曲我不想跳了。

to wait for an unpleasant situation or event to finish, without leaving or taking some other action

The company's management is prepared to sit out the strike rather than agree to union demands. 公司管理层准备硬撑到罢工结束，而不会同意工会的要求。