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English definition of “rot”

rot

verb [I or T] uk   /rɒt/ us    /rɑːt/ (-tt-)
C2 to (cause something to) decay: The fruit had been left to rot on the trees. Rain has got in and rotted (away) the woodwork. the smell of rotting fruitDecaying and staying fresh

rot

noun [U] uk   /rɒt/ us    /rɑːt/
decay: Rot has got into the furniture.Decaying and staying fresh old-fashioned informal nonsense: Don't talk rot!Nonsense
(Definition of rot from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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