DictionaryusurpWrongful seizure
verb

usurp

yoo-ZURP/juːˈzɜːrp/

Take power or a position without the right to do so.

The noble usurps the throne while its rightful ruler protests.

A storybook medieval royal hall: an ambitious adult noble places himself in the throne and reaches for a crown on its cushion while the rightful ruler stands beside the throne protesting with an open hand and surprised courtiers witness.
Etymology

The roots combine as “seize for use.” That idea developed into taking something without a right to it, especially another person's office, authority, or privileges.

In context

Enhanced Public Domain250:21
bessus was to usurp the throne and dispose of Darius by assassinating him or imprisoning him
Alexander the Great Biography (Audiobook)

More examples

  • The king's brother usurped the throne while he was abroad.
  • She accuses her assistant of usurping her role as director.
  • The committee cannot usurp powers reserved for elected officials.

Forms

usurp · usurps · usurped · usurping

usurper noun — Someone who takes power without rightful authority.

usurpation noun — The wrongful taking of power or position.

Similar words

seize
Emphasizes taking control, often forcibly, without necessarily implying illegitimacy.
appropriate
Usually concerns taking property or resources rather than a position.