authority

American  

[uh-thawr-i-tee, uh-thor-] / əˈθɔr ɪ ti, əˈθɒr- /

noun

authorities plural

1. the power to determine, adjudicate, or otherwise settle issues or disputes; jurisdiction; the right to control, command, or determine.

   Synonyms:

   persuasion, sway, power, rule

2. a power or right delegated or given; authorization.

   Who has the authority to grant permission?

3. a person or body of persons in whom authority is vested, as a governmental agency.

   The housing authority provides rental assistance payments to low-income residents.

   The bridges and piers are built and maintained by the Port Authority.

   Synonyms:

   arbiter, sovereign

4. Usually authorities persons having the legal power to make and enforce the law; government.

   They finally persuaded the authorities that they were not involved in espionage.

5. an accepted source of information, advice, etc..

   The Centers for Disease Control and Prevention is the leading authority on vaccines and immunizations.

6. a quotation or citation from such a source.

7. an expert on a subject.

   He is an authority on baseball.

8. persuasive force; cogency.

   She spoke with authority.

9. a statute, court rule, or judicial decision that establishes a rule or principle of law; a ruling.

10. right to respect or acceptance of one's word, command, thought, etc.; commanding influence.

    the authority of a parent;

    the authority of a great writer.

11. mastery in execution or performance, as of a work of art or literature or a piece of music.

12. a warrant for action; justification.

13. testimony; witness.

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authority British  

/ ɔːˈθɒrɪtɪ /

noun

1. the power or right to control, judge, or prohibit the actions of others

2. (often plural) a person or group of people having this power, such as a government, police force, etc

3. a position that commands such a power or right (often in the phrase in authority )

4. such a power or right delegated, esp from one person to another; authorization

   she has his authority

5. the ability to influence or control others

   a man of authority

6. an expert or an authoritative written work in a particular field

   he is an authority on Ming china

7. evidence or testimony

   we have it on his authority that she is dead

8. confidence resulting from great expertise

   the violinist lacked authority in his cadenza

9. (capital when part of a name) a public board or corporation exercising governmental authority in administering some enterprise

   Independent Broadcasting Authority

10. law

    1. a judicial decision, statute, or rule of law that establishes a principle; precedent

    2. legal permission granted to a person to perform a specified act

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Usage

What are other ways to say authority? The noun authority refers to the power to determine, adjudicate, or otherwise settle issues. When should you use this noun over control or influence? Find out on Thesaurus.com. 

Other Word Forms

• antiauthority
  adjective

Etymology

Origin of authority

First recorded in 1200–50; earlier auct(h)oritie, from Latin auctōritās “power, influence, prestige,” equivalent to auctor “authority, originator, supporter” ( see author) + -itās -ity

Explanation

If you have the authority to do something, you have the right or power to do it. You are the big cheese. Or, if you know more about a topic than most, you are an authority on that topic. Giving someone authority grants them the power to make important decisions or have accepted opinions. When you leave your kids with a babysitter, you give her the authority to put them to bed at 7 p.m., no matter how much they insist you let them stay up until midnight. You'll feel more confident leaving the babysitter in charge of bedtime decisions if she's written two books on the subject and is an authority, or renowned expert, on children's sleep habits. Being an authority on children's sleep habits helps your babysitter enforce that 7 p.m. bedtime, but it may not convince the kids.

Example Sentences

Gov. Bill Clements, the first Republican elected to statewide office in Texas since Reconstruction, appointed him to the Trinity River Authority, according to his obituary.

From Salon • May 23, 2026

A relief valve was activated and an overhead sprinkler system was activated to cool down the chemical, said interim Orange County Fire Authority Chief TJ McGovern.

From Los Angeles Times • May 22, 2026

Earlier this year, she was appointed chief executive of the newly-formed Disused Tips Authority for Wales by the then Labour Welsh government – a role with a £120,000 salary.

From BBC • May 22, 2026

Full-price bus tickets from Grand Central Terminal or the Port Authority bus terminal in New York to MetLife Stadium were recently reduced to $20 from $80 after fan outcry over the inflated prices.

From MarketWatch • May 21, 2026

The Port Authority was all noise and rushing.

From "The Wednesday Wars" by Gary D. Schmidt

Related Words

• force
• government
• jurisdiction
• rule