What does the word bulwark mean?

Usage examples for bulwark

  1. A grating had been lashed against the bulwark, and another placed on deck beside it. – The Sea: Its Stirring Story of Adventure, Peril, & Heroism. Volume 1 by Frederick Whymper
  2. It's the bulwark of the British Constitution. – Orley Farm by Anthony Trollope
  3. All that he could do was to hold stoutly to that last bulwark of civilisation. – The Development of the European Nations, 1870-1914 (5th ed.) by John Holland Rose