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English definition of “undreamed of”

undreamed of

adjective uk   /ʌnˈdriːmd.əv/ (also undreamt of,   /ʌnˈdremt.əv/   ) us  
describes wealth, success, or progress that is better or greater than anyone would think possible: We in the West enjoy a standard of living undreamed of by the majority of people in the world. [before noun] These two lads have enjoyed undreamed-of success with their first album.Not expected or planned
(Definition of undreamed of from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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