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English definition of “dream up something”

dream up something

phrasal verb with dream    /drim/ verb (past tense and past participle dreamed  /drimd, dremt/ or dreamt  /dremt/)
to invent something new by using a lot of imagination: The Gerbils is an odd name for a baseball team – who dreamed it up?
(Definition of dream up something from the Cambridge Academic Content Dictionary © Cambridge University Press)
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