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

An unidentified media office representative did not say what part of the data was incorrect and did not directly address questions about The Post’s findings. —Seth Klamann, Denver Post, 6 Apr. 2026

And the trail seemingly ended there, until the FBI and Google recovered home security video showing a masked man on her doorstep — who is still unidentified. —Michael Ruiz, FOXNews.com, 5 Apr. 2026

UFOs, the term for unidentified flying objects, has in recent years given way to UAP — unidentified aerial phenomena or unidentified anomalous phenomena. —ABC News, 4 Apr. 2026

Police and firefighters responded and pulled an unidentified man's body out of the water. —Todd Feurer, CBS News, 4 Apr. 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