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

• 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

Throughout the years, similarities between the unidentified man’s death and Kraft’s other victims led authorities to believe Kraft may have been involved. —Julia Bonavita, FOXNews.com, 23 Aug. 2025

Video showed an unidentified mail carrier approaching their home, then stopping to spray an unknown substance from a canister onto a letter. —Angel Saunders, People.com, 22 Aug. 2025

An unidentified man was crossing the street, an arrest report read. —Devoun Cetoute, Miami Herald, 22 Aug. 2025

There are more than 11,000 unidentified bodies in the U.S., according to the National Missing and Unidentified Persons System. —Ciara McCarthy, Fort Worth Star-Telegram, 22 Aug. 2025

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