What does the word moat mean?

Usage examples for moat

  1. Then Cedric broke away from me and plunged into the moat. – Cedric, the Forester by Bernard Gay Marshall
  2. What harm, then, could a man do in the moat? – The Prisoner of Zenda by Anthony Hope
  3. They've windows on the little court inside, and windows outside, on the moat. – The Brightener by C. N. Williamson A. M. Williamson