to start having a relationship with or communicating with another person, company, country, or organization again, after a previous relationship or communication has ended

We lost touch years ago, but I have just written to them to try to re-establish contact.

As the borders open, several countries are re-establishing normal diplomatic ties. 随着边界的开放，一些国家正在重建正常的外交关系。

to cause something or someone to be accepted or to have a particular position again, for a second, third, etc. time

Sport has the job of reestablishing its credibility after the doping scandal.

He badly wants to re-establish himself as a force in golf. 他非常想重新确立自己在高尔夫运动中的地位。