to form a new opinion or make a new decision about something that is different from your old one

If you change your mind about coming tonight, just give me a call. 要是你改变主意今晚不来了，给我打个电话就行。

When I first met him I didn't like him but I've changed my mind. 我第一次见到他时并不喜欢他，可是现在已经改变了看法。

George didn't want to come, but we persuaded him to change his mind.

I'm thinking of studying psychology, but I keep changing my mind.

They had planned to go ahead with the court hearings that week, but lack of space forced them to change their minds.

See also: change verb (BECOME DIFFERENT)