Mistaken/mɪˈsteɪkən/ Definition 1 of 2Pro Tip 1/3Common Confusion Easily confused with 'misunderstood', which means not grasped clearly. You misunderstood my point, but also, you were mistaken about the facts. Pro Tip 2/3Polite Correction Use 'You might be mistaken' to gently correct someone. You might be mistaken about the meeting time; it's at nine. Pro Tip 3/3Self-Admission 'I was mistaken' shows you acknowledge your own error. I was mistaken about her intentions, and I apologize for that.