Definition of Arrogation

Babylon English Dictionary
taking of something unjustly
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Arrogation Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(n.)
The act of arrogating, or making exorbitant claims; the act of taking more than one is justly entitled to.
  
(n.)
Adoption of a person of full age.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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arrogation
\ar`ro*ga"tion\ (&?;), n. [l. arrogatio, fr. arrogare. cf. adrogation.]
1. the act of arrogating, or making exorbitant claims; the act of taking more than one is justly entitled to. all.
2. (civ. law) adoption of a person of full age.

WordNet 2.0

Noun
1. seizure by the government
(synonym) confiscation
(hypernym) seizure
(hyponym) expropriation
(derivation) assume, usurp, seize, take over, arrogate