entry to another's property without right or permission
<noun.act>
wrongfully seizing and holding (an office or powers) by force (especially the seizure of a throne or supreme authority)
<noun.act> a succession of generals who ruled by usurpation
Usurpation \U`sur*pa"tion\, n. [L. usurpatio ? making use, usurpation: cf. F. usurpation.] 1. The act of usurping, or of seizing and enjoying; an authorized, arbitrary assumption and exercise of power, especially an infringing on the rights of others; specifically, the illegal seizure of sovereign power; -- commonly used with of, also used with on or upon; as, the usurpation of a throne; the usurpation of the supreme power.
He contrived their destruction, with the usurpation of the regal dignity upon him. --Sir T. More.
A law [of a State] which is a usurpation upon the general government. --O. Ellsworth.
Manifest usurpation on the rights of other States. --D. Webster.
Note: Usurpation, in a peculiar sense, formerly denoted the absolute ouster and dispossession of the patron of a church, by a stranger presenting a clerk to a vacant benefice, who us thereupon admitted and instituted.
2. Use; usage; custom. [Obs.] --Bp. Pearson.
Cuomo said the federal government's attempt to derail the tearing down of the Long Island nuclear power plant amounted to usurpation of state's rights.
An era of unprecedented judicial usurpation was born.
They are upset about usurpation only when they don't like the result.
Americans think as little as possible about the usurpation of the continent from native Indians.
Indeed Mr. Haig is the only candidate to engage in a frontal attack on Congress for its unconstitutional usurpation of the presidency's foreign-policy and budget powers.