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English definition of “usurp”

usurp

verb [T] uk   /juːˈzɜːp/ /-ˈsɜːp/ us    /-ˈzɝːp/ /-ˈsɝːp/ formal
to take control of a position of power, especially without having the right to: The powers of local councils are being usurped by central government.Politics
usurper
noun [C] uk   /juːˈzɜː.pər/ /-ˈsɜː-/ us    /-ˈzɝː.pɚ/ /-ˈsɝː-/
(Definition of usurp from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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