unauthorized
Americanadjective
-
lacking permission; unsanctioned.
unauthorized access.
-
lacking proper immigration or working papers: an unauthorized immigrant.
an unauthorized worker;
an unauthorized immigrant.
adjective
Sensitive Note
See illegal alien.
Etymology
Origin of unauthorized
First recorded in 1595–1600; un- 1 ( def. ) + authorized ( def. )
Explanation
If something is officially not approved, it's unauthorized. An unauthorized biography is written without the consent or cooperation of its subject. If a person lacks the authority to do something, you can describe them as unauthorized: "Sorry, I'm unauthorized to let you into the secret clubhouse." Otherwise, this adjective means "not permitted." Many unauthorized things are also illegal, like an online company's unauthorized use of personal information. To authorize is to give approval.
Vocabulary lists containing unauthorized
No Talking
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Novel Study: Their Eyes Were Watching God, Chapters 7–15
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Onyeka and the Academy of the Sun
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Coxon's resignation comes as Anthropic prepares for its market debut, following a summer marked by unauthorized hacks carried out by AI tools during testing.
From Barron's ● Sep. 9, 2026
Anthropic also recently discovered that its models had gained unauthorized access to three unnamed organizations during testing that was supposed to keep them away from "real-world" systems.
From Barron's ● Sep. 1, 2026
Many creators oppose AI because it could replace humans and was built using the unauthorized scraping of creative works used to train generative AI video and image models.
From Los Angeles Times ● Aug. 29, 2026
Qin echoed that unauthorized use of surveillance data among law enforcement isn’t unprecedented.
From Salon ● Aug. 17, 2026
It issued thirty fines for carrying Kodaks without a permit, thirty-seven for taking unauthorized photographs.
From "The Devil in the White City" by Erik Larson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
