USURP Meaning of USURP in English v. 1 tr. seize or assume (a throne or power etc.) wrongfully. 2 intr. (foll. by on, upon) encroach. usurpation n. usurper n.[ ME f. OF usurper f. L usurpare seize for use ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012