change so's mind meaning

• [American slang]
  to cause a person to think differently (about someone or something).
    Tom thought Mary was unkind, but an evening out with her changed his mind.
    I can change my mind if you convince me that you are right.

• change of mind:    Noun: change of mi ...
• change one's mind:    To form a differen ...
• change someone's mind:    [American idiom]to ...