[j?'z?:p, j?'s?:p]
¦ verb
1. take (a position of power) illegally or by force.
supplant (someone in power).
2. (usurp on/upon) archaic infringe on.
Derivatives
usurpation ?ju:z?'pe??(?)n, ?ju:s- noun
usurper noun
Origin
ME: from OFr. usurper, from L. usurpare 'seize for use'.