What does the word tenacity mean?

Usage examples for tenacity

  1. Of course he has to be intelligent and have a range of knowledge that can be used to impress people, but most of all, he has to have a will of iron, an unswerving tenacity of purpose, and an uncompromising self- confidence about who he is, what he wants. – Life Blood by Thomas Hoover
  2. At last tenacity and courage told. – The Kangaroo Marines by R. W. Campbell
  3. Holding on by the rope with great tenacity, the only difficulty now in the way seemed his legs, which were too short to get crossed upon the oar. – The Life and Adventures of Maj. Roger Sherman Potter by "Pheleg Van Trusedale" A pseudonym for Francis Colburn Adams