What does the word line mean?

Usage examples for line

  1. " Mebbe we can get around the line. – The Young Forester by Zane Grey
  2. Good enough; but we'll get our line ready, too. – "Where Angels Fear to Tread" and Other Stories of the Sea by Morgan Robertson
  3. At least, not on that line. – Tarrano the Conqueror by Raymond King Cummings