What is the meaning of boil?

noun

• A painful sore with a hard core filled with pus.
  • synonyms: furuncle
• The temperature at which a liquid boils at sea level.
  • usage: "they brought the water to a boil"
  • synonyms: boiling point

verb

• Come to the boiling point and change from a liquid to vapor.
  • usage: "Water boils at 100 degrees Celsius"
• Immerse or be immersed in a boiling liquid, often for cooking purposes.
  • usage: "boil potatoes"; "boil wool"
• Bring to, or maintain at, the boiling point.
  • usage: "boil this liquid until it evaporates"
• Be agitated.
  • usage: "the sea was churning in the storm"
  • synonyms: churn, moil, roil
• Be in an agitated emotional state.
  • usage: "The customer was seething with anger"
  • synonyms: seethe