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 of unidentified

• one
• unnamed

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

Two months later, Argumedo tried to collect a debt from an unidentified Pomona man, according to the complaint. — Matthew Ormseth, Los Angeles Times, 9 Oct. 2026

During a press conference before noon, Fort Worth Fire confirmed the pilot, a man who remains unidentified as of publication, was declared dead at the scene. — Matthew Ablon, CBS News, 7 Oct. 2026

The unidentified man reportedly drove into traffic before being hit. — Shambhavi Rimal, Fort Worth Star-Telegram, 6 Oct. 2026

Burke, who was reconstructing fossil gharials for his doctoral project, noted the subtle differences between the unidentified species and the false gharial, and started to work on an up-to-date description in December 2023. — Taylor Nicioli, CNN Money, 6 Oct. 2026

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