Definition of "Boil" :

noun: the temperature at which a liquid boils at sea level

"They brought the water to a boil."

noun: a painful sore with a hard core filled with pus

verb: immerse or be immersed in a boiling liquid, often for cooking purposes

"Boil potatoes."

verb: bring to, or maintain at, the boiling point

"Boil this liquid until it evaporates."

verb: come to the boiling point and change from a liquid to vapor

"Water boils at 100 degrees Celsius."

verb: be in an agitated emotional state

verb: be agitated