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English definition of “rehash”

rehash

noun [C]     /ˈriː.hæʃ/ informal disapproving
writing or speech that uses old ideas as if they were new: His new book is just a rehash (of his previous ones).Saying againSaying and uttering rehash     /ˌriːˈhæʃ/ verb [T] Some students merely rehash what they've heard in lectures.Saying againSaying and uttering
(Definition of rehash noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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