What does the word notebook mean?

Usage examples for notebook

  1. He asked me if it would be safe to take anything down in his notebook, and when I promised to protect him he wrote three pages. – At Good Old Siwash by George Fitch
  2. Having arrived at this decision, he replaced his notebook in his coat pocket, knocked the ashes out of his pipe, and went to bed. – The Hampstead Mystery by John R. Watson