What does the word mistaken mean?

Usage examples for mistaken

  1. He laughed, not looking at her: And it happens that you- and the others- are mistaken. – The Danger Mark by Robert W. Chambers
  2. " I was not mistaken," he said. – The Blotting Book by E. F. Benson
  3. No; I am not mistaken. – Lessons in Life, For All Who Will Read Them by T. S. Arthur