What does the word incognito mean?

Usage examples for incognito

  1. He told me, of course, presently, when he had had time to think of it, that he had guessed it all along, but had understood that His Grace wished to be incognito; and I suppose at last he came to believe it. – Oddsfish! by Robert Hugh Benson
  2. Under no circumstances, recollect, nor without my special authority, are you to betray the incognito under which I choose to go abroad. – New-Arabian-Nights by Stevenson, Robert Louis
  3. She is travelling incognito, and I did not know she was on the train until she told me last night who she was. – The Underdog by F. Hopkinson Smith