See more synonyms for unauthorized on Thesaurus.com
  1. lacking permission; unsanctioned: unauthorized access.
  2. lacking proper immigration or working papers: an unauthorized worker;an unauthorized immigrant.

Origin of unauthorized

First recorded in 1595–1600; un-1 + authorized

Usage note

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unauthorized

Contemporary Examples of unauthorized

Historical Examples of unauthorized

British Dictionary definitions for unauthorized



  1. not having official permission
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unauthorized

1590s, from un- (1) "not" + past participle of authorize.

Online Etymology Dictionary, © 2010 Douglas Harper