The United Nations has used its authority to restore peace in the area.
We need to get the support of someone in authority.
They have the authority to examine the company's records.
The problem is that teachers feel they no longer have authority over their pupils.
Their parents have lost almost all their authority. (First Certificate in English; B2; French)
local/health/school autorities
Air pollution and traffic congestions are major issues that have been raised by local authorities very recently. (International English Language Testing System; C1; French)
She is an authority on seventeenth-century English literature.
I read the book more than six times and I became an authority on [the] Roman Empire. (Certificate of Proficiency in English; C2; Spanish)
