What is the meaning of gall?

noun

• An open sore on the back of a horse caused by ill-fitting or badly adjusted saddle.
  • synonyms: saddle sore
• A skin sore caused by chafing.
• Abnormal swelling of plant tissue caused by insects or microorganisms or injury.
• A feeling of deep and bitter anger and ill-will.
  • synonyms: resentment, bitterness, rancor, rancour
• A digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats.
  • synonyms: bile
• The trait of being rude and impertinent; inclined to take liberties.
  • synonyms: crust, impertinence, impudence, insolence, cheekiness, freshness

verb

• Become or make sore by or as if by rubbing.
  • synonyms: chafe, fret
• Irritate or vex.
  • usage: "It galls me that we lost the suit"
  • synonyms: irk