One who usurps.

plural of usurper

To seize power from another, usually by illegitimate means. / To use and assume the coat of arms of another person. / To take the place rightfully belonging to someone or something else.

The wrongful seizure of something by force, especially of sovereignty or other authority. / Trespass onto another's property without permission. / A taking or use without right.

simple past tense and past participle of usurp

plural of usurpation

Third-person singular simple present indicative form of usurp

present participle of usurp

usurpation

(obsolete) Usurping; encroaching.