1. A claim to, or a seizure, without justification: The university police were condemned for using arrogations to arbitrarily pepper spray the demonstrating students and arresting them when they complained about the pains in their eyes.
2. The unjust assumption of rights, or privileges, to something of which a person does not have rights for or privileges to: The arrogations of the French aristocracy are said to have helped lead to the French Revolution.