What does the word gall mean?

Usage examples for gall

  1. Gall did not know. – A Tale of a Lonely Parish by F. Marion Crawford
  2. You have got a gall! – McAllister and His Double by Arthur Train
  3. Honest, with all that tiptoein' and whisperin' and serious looks bein' passed around, I didn't even have the gall to guy one of the new typewriter girls. – Torchy by Sewell Ford