Definition of "boil" []

• To change from a liquid to a vapor by the application of heat: All the water boiled away and left the kettle dry. (verb-intransitive)
• To reach the boiling point. (verb-intransitive)
• To undergo the action of boiling, especially in being cooked. (verb-intransitive)
• To be in a state of agitation; seethe: a river boiling over the rocks. (verb-intransitive)
• To be stirred up or greatly excited: The mere idea made me boil. (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Next take, say, a pint of milk, and let it boil; then throw in the bread-crumbs and let them _boil_ in the milk."
• "The idea is you heat the mouth guard, then bite down on it to shape it to your mouth hence the name "boil and bite"."
• "First of all this water coming out of the ground here, this is what they call a boil, this is actually water from the Mississippi River that's boiling out of the ground here, which is fascinating considering that we are obviously on the dry side of the levee."