unidentified

adjective

un·​iden·​ti·​fied ˌən-ī-ˈden-tə-ˌfīd 

-ə-ˈden-

: not having a known or established identity : not identified

unidentified flying objects

an unidentified suspect

Synonyms

• anonymous
• certain
• given
• one
• some
• unnamed
• unspecified

Examples of unidentified in a Sentence

an unidentified worker reported the security breach

some unidentified person helped them and then left quietly

Recent Examples on the Web

The unidentified teens allegedly punched the man in the face and hit him with a backpack before running away. —Brie Stimson , Louis Casiano, FOXNews.com, 26 Apr. 2025

The driver, an unidentified woman, was taken into custody after 12:30 p.m. while TV news helicopters broadcast the standoff live overhead. —Andrew J. Campa, Los Angeles Times, 25 Apr. 2025

The unidentified woman was walking in the area of Stockton Boulevard and Riza Avenue when she was fatally struck, according to Sacramento Police Department officials. —Darrell Smith, Sacbee.com, 25 Apr. 2025

Christie’s provided a brief statement saying the unidentified owner of the sale decided to sell it within the family. —Anthony Demarco, Forbes.com, 25 Apr. 2025

Word History

First Known Use

1861, in the meaning defined above

Phrases Containing unidentified

• unidentified aerial phenomenon
• unidentified anomalous phenomenon
• unidentified flying object

Rhymes for unidentified

• acetaldehyde
• acetanilide
• arabinoside
• cycloheximide
• cyclophosphamide
• diethylamide
• dinucleotide
• ferricyanide
• ferrocyanide
• glutaraldehyde
• glyceraldehyde
• hydroperoxide