USURP Meaning of USURP in English verb 1.Synonyms: arrogate 1, accroach, appropriate, assume, commandeer, preempt Antonyms: abdicate 2.Synonyms: supplant 1, cut out, displace Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003