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

Upon arrival, officers determined that the suspect, who remains unidentified publicly, intentionally drove into the individuals. —Austin Turner, CBS News, 24 May 2026

The shark attacked the unidentified victim, 39, at Kennedy Shoal on the Great Barrier Reef off North Queensland in Australia on Sunday, May 24, according to the Queensland Police Service (QPS). —Raven Brunner, PEOPLE, 24 May 2026

On average, more than 13 years pass between an unidentified specimen’s collection and its formal description as a new species. —K. R. Callaway, Scientific American, 24 May 2026

According to an unidentified man on the phone, Busch was alert at the time. —Paulina Dedaj, FOXNews.com, 23 May 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