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 attack occurred Sunday night in Planadas, a town in Tolima province, where unidentified assailants fired rockets made from gas cylinders at a military base, according to Planadas Mayor Juan Camilo Hueje. — ABC News, 2 Nov. 2026

And Illinois Comptroller Susana Mendoza and lobbyist John Kelly faced objections from unidentified campaigns. — Alice Yin, Chicago Tribune, 2 Nov. 2026

The agent yells at the unidentified bystander and leaves him on the sidewalk while another agent retrieves the can from the street. — Los Angeles Times, 30 Oct. 2026

The next morning an unidentified woman, perhaps his aunt, Maria Thoreau, paid the tax. — René Ostberg, Encyclopedia Britannica, 30 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