What does the word rare mean?

Usage examples for rare

  1. Lady Bell was not only beautiful, she was- what was more rare than beauty- charming. – Only One Love, or Who Was the Heir by Charles Garvice
  2. They are very rare. – The Boy Hunters by Captain Mayne Reid
  3. Sink me if it is not a rare plan. – The Green Flag by Arthur Conan Doyle