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English definition of “mash”

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mash

verb [T] uk   /mæʃ/ us  
to crush food, usually after cooking it, so that it forms a soft mass: Mash the potatoes and then mix in the butter and herbs. mainly US informal to violently crush part of a body or an object: His face was badly mashed up in the accident.
Phrasal verbs

mash

noun [U] uk   /mæʃ/ UK informal us  
→  mashed potatoes : sausage and mash
(Definition of mash from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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