What does the word unmask mean?

Usage examples for unmask

  1. Be that as it may, Prince Michael Delgrado offered no reply to the decrepit, poverty stricken artist who had dared to unmask him in such exceedingly plain terms. – A Son of the Immortals by Louis Tracy
  2. We have to be ready to unmask at supper, you know. – Cruel As The Grave by Mrs. Emma D. E. N. Southworth
  3. Some day I shall unmask you. – Romance by Joseph Conrad and F.M. Hueffer