verb · to be directly concerned with or confronted by a specific situation or incident

当事双方最终达成了庭外和解。

verb · to be in charge of or handle a specific matter or affair

这件公事由他当事，处理得十分稳妥。

verb · to be of importance

这点小伤不当事。

verb · to consider as a matter of importance

他从不把这件事当事。