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.
Created during the Cold War, that system was designed to prevent sensitive technology from reaching adversaries or unauthorized third parties and to give Washington oversight of how U.S. weapons were used abroad.
From The Wall Street Journal ● Aug. 30, 2026
Lancaster and Palmdale, the two incorporated cities of Antelope Valley about 15 miles west of Pearblossom, also attract unauthorized RVs.
From Los Angeles Times ● Aug. 28, 2026
Qin echoed that unauthorized use of surveillance data among law enforcement isn’t unprecedented.
From Salon ● Aug. 17, 2026
I am currently a plaintiff in a class-action lawsuit against Open AI and Microsoft, due to their unauthorized use of my and many other writers’ works for training their large language models.
From The Wall Street Journal ● Aug. 13, 2026
“Everyone at the Park has. And everyone working in conjunction with the Park. It ensures protection against espionage and the unauthorized disclosure of information.”
From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin
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.
