1. (noun)authority, authorization, authorisation, potency, dominance, say-so the power or right to give orders or make decisions "he has the authority to issue warrants"; "deputies are given authorization to make arrests"; "a place of potency in the state"
2. (noun)authority (usually plural) persons who exercise (administrative) control over others "the authorities have issued a curfew"
3. (noun)authority an expert whose views are taken as definitive "he is an authority on corporate law"
4. (noun)assurance, self-assurance, confidence, self-confidence, authority, sureness freedom from doubt; belief in yourself and your abilities "his assurance in his superiority did not make him popular"; "after that failure he lost his confidence"; "she spoke with authority"
5. (noun)agency, federal agency, government agency, bureau, office, authority an administrative unit of government "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority"
6. (noun)authority, authorization, authorisation, sanction officialpermission or approval "authority for the program was renewed several times"
7. (noun)authority an authoritative written work "this book is the final authority on the life of Milton"
3. authority the authorities the police or another group with the power to enforce the law
4. authority confidence and the appearance of control to speak with authority
5. authority an expert in a subject a world authority on plant biology
Definition of 'authority'
Webster Dictionary
1. (noun)authority legal or rightful power; a right to command or to act; power exercised buy a person in virtue of his office or trust; dominion; jurisdiction; authorization; as, the authority of a prince over subjects, and of parents over children; the authority of a court
3. (noun)authority the power derived from opinion, respect, or esteem; influence of character, office, or station, or mental or moral superiority, and the like; claim to be believed or obeyed; as, an historian of no authority; a magistrate of greatauthority
4. (noun)authority that which, or one who, is claimed or appealed to in support of opinions, actions, measures, etc