What does the word heel mean?

Usage examples for heel

  1. And he turned on his heel, leaving me speechless. – The Maids of Paradise by Robert W. (Robert William) Chambers
  2. His shoes were down at the heel, and his collar was open. – Look Back on Happiness by Knut Hamsun
  3. At any rate, he turned on his heel and left, after a nervous word or two. – The Professor's Mystery by Wells Hastings Brian Hooker