What does the word each mean?

Usage examples for each

  1. Anna was naturally of an inquiring mind, and her mother's last remark awoke within her a new and strange train of thought, causing her to wonder whose little girl she would have been, her father's or mother's, in case they had each married some one else! – 'Lena Rivers by Mary J. Holmes
  2. She would like to have you, and I am sure you would like each other." – Eunice by Margaret Murray Robertson
  3. We might as well understand each other." – The Landleaguers by Anthony Trollope