unlawful

adjective

un·​law·​ful ˌən-ˈlȯ-fəl 

1

a

: not lawful : illegal

unlawful actions

b

: acting contrary to or in defiance of the law

an unlawful possessor

2

: not morally right or conventional

unlawfully

ˌən-ˈlȯ-f(ə-)lē 

adverb

unlawfulness

ˌən-ˈlȯ-fəl-nəs 

noun

Synonyms of unlawful

• illegal
• illicit
• criminal

Examples of unlawful in a Sentence

The sale of alcohol to minors is unlawful.

it is unlawful to set off fireworks within the city limits

Recent Examples on the Web

Irina Vernikov, a New York City councilwoman who was charged with unlawful possession of a firearm after bringing a licensed handgun to a pro-Israel rally in 2023 amid a spike in antisemitic hate crimes in New York City, thanked Bondi for intervening in the Hawaii case. —Michael Ruiz, FOXNews.com, 25 Nov. 2025

Mark Kelly was the top fundraiser on a Democratic donation-processing platform Tuesday morning as the Arizona senator faced threats of retribution from Defense Secretary Pete Hegseth over a recent video criticizing unlawful military orders. —Daniel Orton, MSNBC Newsweek, 25 Nov. 2025

Swalwell asked a federal judge to declare Pulte's actions unlawful, force the withdrawal of the criminal referral, and issue damages. —Peter Charalambous, ABC News, 25 Nov. 2025

After the beating and arrest, Abuatelah was charged as a juvenile with unlawful use of a weapon, resisting arrest, and possession of cannabis. —Todd Feurer, CBS News, 25 Nov. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for unlawful

• awful
• lawful
• offal
• waffle

Kids Definition

unlawful

adjective

un·​law·​ful ˌən-ˈlȯ-fəl 

ˈən-

: not lawful : being against the law : illegal

unlawfully

-f(ə-)lē 

adverb

unlawfulness

-fəl-nəs 

noun

Legal Definition

unlawful

adjective

un·​law·​ful

1

: not lawful : not authorized or justified by law

2

: acting contrary to or in defiance of the law

an unlawful possessor

unlawfully adverb

unlawfulness noun