What does the word ferrule mean?

Usage examples for ferrule

  1. I told him I was a bit tender in that locality and the ferrule of his umbrella was sharp. – "Speaking of Operations--" by Irvin S. Cobb
  2. Then he set the reeking ferrule in his stirrup boot, slung the shaft from the braided arm loop, and drew his revolver- the new weapon lately issued, with its curious fixed ammunition and its cap imbedded. – Ailsa Paige by Robert W. Chambers
  3. A ferrule of brass tube is fitted to the heel of the mast, a cut of suitable size being made in it to receive the upright of the step. – Boys' Book of Model Boats by Raymond Francis Yates