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boil over

(LIQUID) phrasal verb with boil
 
 
/bɔɪl/ verb

Definition

If a liquid that is being heated boils over, it rises up and flows over the edge of the pan: Take the milk off the heat before it boils over.Physical and chemical processes If a pan boils over, the liquid in it rises up and flows over the edge: That saucepan is boiling over.Physical and chemical processes
(Definition of boil over (LIQUID) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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