(rhetoric) Deeming an assertion to be true because of the position or the authority of the person asserting it.

Someone who is in a position of authority.

(library science) The organization of bibliographic information by using a single distinct spelling of a name (heading) or a numeric identifier for each topic or agent.

(Australia, New Zealand, UK, law) A body set up by law which is authorised to enforce legislation on behalf of the relevant country or state.

plural of unitary authority

In local government, a single-tier authority which replaces a two-tier structure. For example, in England, county councils are abolished and their responsibilities are transferred to boroughs and local government districts (but this only applies to some counties, not all). In some cases complete counties, such as Cornwall and Northumberland, are now unitary authorities without any subdivision into local government districts.

plural of authority figure

(business) The authority of an employee acting unilaterally to commit an employer to a contract. / (business) The maximum value of such contract.

Third-person singular simple present indicative form of de-authorize

(euphemistic) Disobedience, a disinclination to obey.