B2[U]the moral or legal right or ability to control: The United Nations has used/exerted/exercised its authority to restore peace in the area.We need to get the support of someone in authority (= an important or high-ranking person).They've been acting illegally and without authority (= permission) from the council.[+ to infinitive]I'll give my lawyers authority (= permission)to act on my behalf.He's got no authority over(= ability to control) his students.She spoke with authority (= as if she was in control or had special knowledge).People in charge of or controlling other peopleBosses, managers and directorsC1[C]a group of people with official responsibility for a particular area of activity: the health authoritythe local housing authorityPeople in charge of or controlling other peopleBosses, managers and directorsthe authorities[plural]›the group of people with official legal power to make decisions or make people obey the laws in a particular area, such as the police or a local government department: I'm going to report these holes in the road to the authorities.Local government and politics