boil - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “boil”

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boil

verb [I/T]  us   /bɔɪl/

boil verb [I/T] (HEAT)

(of a liquid) to start to turn into a gas because of being heated, or to cause a liquid to turn into a gas in this way: [I] The water is boiling. [T] We’d better boil this water before we drink it. If you say that a container has boiled, the liquid in it has started to turn into a gas: [I] The pot’s beginning to boil. If food boils, or you boil food, it is cooked by being put in water that is heated until the water is in the process of turning into a gas: [T] I boiled some potatoes for dinner.

boil

noun  us   /bɔɪl/

boil noun (SWELLING)

[C] a painful, red swelling on the skin that is filled with pus (= a yellow liquid from an infection)

boil noun (HEAT)

[U] If you bring something to a boil, or let something come to a boil, you heat it until it starts to turn into a gas: Bring the water to a boil, then add the pasta.
(Definition of boil from the Cambridge Academic Content Dictionary © Cambridge University Press)
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