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.
ByteDance in response said it was taking steps to strengthen its safeguards to prevent unauthorized use of IP or likeness.
From Los Angeles Times ● Aug. 17, 2026
Qin echoed that unauthorized use of surveillance data among law enforcement isn’t unprecedented.
From Salon ● Aug. 17, 2026
Then on July 30, Anthropic revealed that it also found three incidents where AI models being tested "gained unauthorized access" to unnamed organizations.
From Barron's ● Aug. 5, 2026
At the 156 non-conversion projects inspected in the sweep, the department issued 62 violations and 18 stop-work orders for a variety of issues, including work that didn’t match drawings and unauthorized work on a Saturday.
From The Wall Street Journal ● Aug. 4, 2026
One agent complained that “information contained in reports immediately gets into the possession of unauthorized and unscrupulous persons.”
From "Killers of the Flower Moon" by David Grann
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.
