unregistered

adjective

un·​reg·​is·​tered ˌən-ˈre-jə-stərd 

: not registered: such as

a

: not having entered one's name on a voting list

unregistered voters

b

: unrecorded or not filed in the place provided by law

an unregistered motor vehicle

c

: not recorded with or certified by an appropriate breeders' association

unregistered cattle

Synonyms

• unlisted
• unrecorded
• undisclosed
• unidentified
• unspecified

Examples of unregistered in a Sentence

an unregistered car

Recent Examples on the Web

Operating an unregistered motor vehicle. —Flint McColgan, Boston Herald, 25 Oct. 2025

Without formal recognition, unregistered unions are not able to collect union dues from members or represent them in disputes, leaving workers legally unprotected and employers unaccountable. —Sourcing Journal, 15 Oct. 2025

He was charged with possessing unregistered firearms and unlawful ammunition, and with making a threat to injure someone from across state lines. —Charles Bethea, New Yorker, 24 Sep. 2025

Three years later, the EPA fined CBD American Shaman for selling unregistered antimicrobial products during the pandemic. —Kansas City Star, 18 Sep. 2025

Word History

First Known Use

1603, in the meaning defined above

Rhymes for unregistered

• registered

Legal Definition

unregistered

adjective

un·​reg·​is·​tered

ˌən-ˈre-jə-stərd

: not registered

charged with operating an unregistered motor vehicle

see also unregistered security at security