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

Law enforcement declared an unlawful assembly following Pretti's killing. —Kiki Intarasuwan, CBS News, 25 Jan. 2026

Investigators allege that Rodriguez was the unlawful holder of the driver’s license and had assumed the man’s identity. —Stephen Underwood, Hartford Courant, 24 Jan. 2026

Court records show that Moss was charged in 2024 with a range of felonies, including domestic battery and unlawful possession of a firearm by a serious violent felon. —Patrick Smith, NBC news, 23 Jan. 2026

In June 2024, court records show, Moss was charged with three felony counts of domestic battery, three felony counts of unlawful possession of a firearm, two felony counts of intimidation and felony criminal recklessness. —Adam Sabes, FOXNews.com, 23 Jan. 2026

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