What does the word ridge mean?

Usage examples for ridge

  1. With the aid of my pike, using it as I had done before, I regained the ridge of the roof, and went back to the spot where I had left Balbi. – The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons by Jacques Casanova de Seingalt
  2. Now he had reached the further end of the ridge. – Pelle the Conqueror, Vol. 2 by Martin Anderson Nexo