definition of
usurpation

[1] #1 usurpation n. [trespass, encroachment, violation, intrusion] entry to another's property without right or permission. wn

[2] #2 usurpation n. wrongfully seizing and holding (an office or powers) by force (especially the seizure of a throne or supreme authority); "a succession of generals who ruled by usurpation". wn