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

Prosecutors alleged that Zhang flew from California to Las Vegas and then to the Seattle area to conduct surveillance of the unidentified son and his home from outside. — David Douglas, NBC news, 19 Oct. 2026

In their filing, prosecutors did not mention that prince by name, or say that the unidentified royal who communicated with Alfozan had ties to Raed. — Dan Mangan, CNBC, 19 Oct. 2026

Police officers were not injured in the shooting, and the unidentified man remained inside the house. — Los Angeles Times, 18 Oct. 2026

The unidentified man in his 30s was rushed to the hospital in critical condition but was pronounced dead later in the afternoon, according to the police. — ABC News, 17 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