What is the meaning of bristle?

noun

• A stiff fiber (coarse hair or filament); natural or synthetic.
• A stiff hair.

verb

• Be in a state of movement or action.
  • usage: "The room abounded with screaming children"; "The garden bristled with toddlers"
  • synonyms: abound, burst
• Rise up as in fear.
  • usage: "The dog's fur bristled"; "It was a sight to make one's hair uprise"
  • synonyms: uprise, stand up
• Have or be thickly covered with or as if with bristles.
  • usage: "bristling leaves"
• React in an offended or angry manner.
  • usage: "He bristled at her suggestion that he should teach her how to use the program"