as in improper
without permission; not authorized
an unauthorized use of government vehicles Unauthorized personnel are not allowed in the building.
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of unauthorized
An alarming 94% of CEOs suspect employees secretly use unauthorized AI tools to complete company work.
—
Caroline Castrillon, Forbes.com, 22 May 2025
The agency has also issued more than 750 warning letters to companies making or selling unauthorized vaping products and over 800 warnings to stores selling them.
—Youri Benadjaoud, ABC News, 22 May 2025
Platforms will not have to monitor their sites for unauthorized digital replicas.
—Ted Johnson, Deadline, 21 May 2025
Platforms will need to remove unauthorized deepfakes or AI quickly after notice and cut off repeat offenders, according to Deadline.
—Tomás Mier, Rolling Stone, 21 May 2025
See All Example Sentences for unauthorized
Caroline Castrillon, Forbes.com, 22 May 2025
The agency has also issued more than 750 warning letters to companies making or selling unauthorized vaping products and over 800 warnings to stores selling them.
—Youri Benadjaoud, ABC News, 22 May 2025
Platforms will not have to monitor their sites for unauthorized digital replicas.
—Ted Johnson, Deadline, 21 May 2025
Platforms will need to remove unauthorized deepfakes or AI quickly after notice and cut off repeat offenders, according to Deadline.
—Tomás Mier, Rolling Stone, 21 May 2025
See All Example Sentences for unauthorized
Recent Examples of Synonyms for unauthorized
Adjective
-
An arrest does not constitute a finding of guilt: A 30-year-old woman from Naperville was arrested on two warrants and on charges of improper lane usage and criminal defacement of property at 2:27 a.m. May 25 in the 1500 block of Fairway Drive.—
Steve Metsch,
Chicago Tribune,
2 June 2025
-
Zika is especially dangerous for pregnant women because it can be transmitted to the fetus, causing microcephaly (a smaller head), improper brain development, and cerebral palsy.—
Cara Lynn Shultz,
People.com,
30 May 2025
Adjective
-
Instead of calling for an expansive probe, however, the president identified just one potential target: ActBlue, the Democrats’ online fundraising juggernaut, which has acknowledged receiving over 200 potentially illicit contributions last year from foreign internet addresses.—
Brian Slodysko,
Los Angeles Times,
27 May 2025
-
Wetherell wrote that Trump's justification for the tariffs -- both stemming the flow of illicit drugs into the country and resolving a trade imbalance -- is sufficient to satisfy the terms set by Congress.—
Peter Charalambous,
ABC News,
23 May 2025
Adjective
-
Louisville police say anything that goes into the air or explodes is illegal for average citizens.—
James Bruggers,
The Courier-Journal,
5 July 2017
-
Official fireworks shows took place over the city, and illegal pyrotechnics lit up the sky everywhere in between.—
Lisa Beebe,
Los Angeles Magazine,
5 July 2017
Adjective
-
In 2022, Hemphill pleaded guilty to unlawful parading, a misdemeanor charge that got her two months in prison, three years of probation and a $500 fine.—
Theresa Braine,
New York Daily News,
4 June 2025
-
The man faces one count each of first-degree assault or attempted serious physical injury, armed criminal action, unlawful possession of a firearm, resisting arrest or detention by fleeing, and second-degree domestic assault.—
Caroline Zimmerman,
Kansas City Star,
4 June 2025
Adjective
-
There can be a change to the list if a storm is so deadly or costly that the future use of its name on another would be inappropriate.—
Jordan King,
MSNBC Newsweek,
3 June 2025
-
Both the city’s account and Mayor Quinton Lucas issued online apologies that night, agreeing that the post was inappropriate.—
Mike Hendricks,
Kansas City Star,
3 June 2025
Adjective
-
And sometimes the soldiers can do things which are totally unacceptable and can be called crimes.—
Isaac Chotiner,
New Yorker,
6 June 2025
-
Shamkhani underscored that the absence of sanctions relief rendered the U.S. plan unacceptable.—
Amir Daftari,
MSNBC Newsweek,
5 June 2025
Adjective
-
This secret-keeping tradition kept President François Mitterrand’s illegitimate daughter hidden for years.—
Saskya Vandoorne,
CNN Money,
27 May 2025
-
Maduro, whose reelection last year to a third term has been condemned internationally as illegitimate, also has cracked down on his political opponents.—
Mark Sherman,
Chicago Tribune,
19 May 2025
Cite this Entry
“Unauthorized.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unauthorized. Accessed 10 Jun. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share