Merriam-Webster’s Collegiate Dictionary’s definition- Usurp (verb) - to take possession of without legal claim, to seize and hold as office, place, or power in possession by force or without right. To seize or exercise authority or possession wrongfully.
1.To seize and hold (a position, office, power, etc.) by force or without legal right.
Example: The pretender tried to usurp the throne.
2.To use without authority or right; employ wrongfully.
Example: The magazine usurped copyrighted material.
3. To commit forcible or illegal seizure of an office, power.
Pronunciation- [yoo-surp, -zurp]
self-u·surp, verb (used without object)