What does the word resource mean?

Usage examples for resource

  1. I had, therefore, no other resource but to advise him to leave the country of his own accord. – My Three Years in America by Johann Heinrich Andreas Hermann Albrecht Graf von Bernstorff
  2. Even other friends were not available as a resource in the solitary evening hours. – The Black Robe by Wilkie Collins
  3. So this is another resource upon which the author may draw according to his need; sometimes it will be indispensable, and generally, I suppose, it will be useful. – The Craft of Fiction by Percy Lubbock