authority · noun /əˈθɔːr.ət̬.i/Full view
Nouns: authority, authorization
Adjectives: authoritarian, authoritative, unauthorized
Verbs: authorize
Adverbs: authoritatively
authority (POWER)
B2 U the power to make decisions or to control other people
Dictionary examples:

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.

Learner example:

Their parents have lost almost all their authority. (First Certificate in English; B2; French)

authority (OFFICIAL)
C1 C someone with official power to control a particular type of activity
Dictionary example:

local/health/school autorities

Learner example:

Air pollution and traffic congestions are major issues that have been raised by local authorities very recently. (International English Language Testing System; C1; French)

an authority on sth
C2 someone who has a lot of knowledge about a particular subject
Dictionary example:

She is an authority on seventeenth-century English literature.

Learner example:

I read the book more than six times and I became an authority on [the] Roman Empire. (Certificate of Proficiency in English; C2; Spanish)

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