What does the word hook mean?

Usage examples for hook

  1. Because there is so little for the hook to hold on by. – Menhardoc by George Manville Fenn
  2. So he took it carefully off the hook and threw it back into the water. – Five Little Friends by Sherred Willcox Adams Maud and Miska Petersham
  3. Shall I go down and hook on, sir? – "Where Angels Fear to Tread" and Other Stories of the Sea by Morgan Robertson