read (one's) mind(redirected from read their mind)
read (one's) mind
To unknowingly say what someone else is thinking. You read my mind—that's exactly where I want to go to dinner!
read someone's mind
Fig. to guess what someone is thinking. You'll have to tell me what you want. I can't read your mind, you know. If I could read your mind, I'd know what you expect of me.