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

The president also posted a fake image of himself and several of his administration officials in swimsuits, along with an unidentified woman in a bikini lounging in the water. — Willem Marx, NPR, 21 June 2026

The unidentified driver was not seriously injured in the crash, according to the fire department. — Logan Smith, CBS News, 21 June 2026

According to an unidentified union source cited by Reuters, a memory chip worker with a base ​salary of 80 million won ($52,400) is expected to receive a total bonus of around 626 million won ($410,000) this year. — Lim Hui Jie,blair Baek, CNBC, 20 June 2026

Cambridgeshire police said that the man, who remains unidentified, wasn’t fit to be interviewed. — Brie Stimson, FOXNews.com, 20 June 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