authorities

1. The police have no legal authority in these disputes.

2. We have to find someone in authority (= a position of power).

3. government/church authorities

4. No attacks were reported to the authorities

5. an authority on immigration law

6. The United Nations has used/exerted/exercised its authority to restore peace in the area.

7. We need to get the support of someone in authority (= an important or high-ranking person).

8. They've been acting illegally and without authority (= permission) from the council.

9. [ + to infinitive ] I'll give my lawyers authority (= permission) to act on my behalf.

10. He has no authority over (= ability to control) his students.

11. She spoke with authority (= as if she was in control or had special knowledge).

12. the health authority

13. the local housing authority

14. I'm going to report these potholes to the authorities

15. She's a world authority on 19th-century Irish history.