What does the word wily mean?

Usage examples for wily

  1. Or, still more thrilling, a pair of wily gray rats? – The Brightener by C. N. Williamson A. M. Williamson
  2. Only too often, peer as cautiously as we might, the wily old mallards would catch a glimpse of some slight motion. – The Killer by Stewart Edward White
  3. The wily Indian watched his opportunity, and when Sanchez was looking another way, plunged into the water and disappeared. – The Life and Voyages of Christopher Columbus (Vol. II) by Washington Irving