What does the word thump mean?

Usage examples for thump

  1. We take elaborate pains to guard our face, and get a thump in the small of the back. – Pebbles on the Shore by Alpha of the Plough (Alfred George Gardiner)
  2. Nance's heart gave a violent thump. – Molly Brown's Junior Days by Nell Speed
  3. " It is a wonderful thing for you to have done, dear," he said at last, with a look that got down to the core of my inexperienced heart and made it thump uncomfortably. – Phyllis by Maria Thompson Daviess