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

Hiddleston relies on professors, scholars, archaeologists and psychologists to piece together what happened to a teenage blacksmith apprentice, a businesswoman/bathhouse proprietor and an unidentified Praetorian guard. — Brian Davids, HollywoodReporter, 16 July 2026

One of the victims, still unidentified, succumbed to his injuries at the hospital, police said. — Dean Fioresi, CBS News, 14 July 2026

On Monday afternoon, an unidentified marine animal bit a person in the Foster City Lagoon near Shearwater Isle, according to the Foster City Police Department. — Jason Green, Mercury News, 14 July 2026

Three pets – a dog named Dakota and two unidentified cats – died in the blaze, according to Fox 45. — Anthony Thompson, USA Today, 14 July 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