unlawful

adjective

un·​law·​ful ˌən-ˈlȯ-fəl How to pronounce unlawful (audio)
Synonyms of unlawfulnext
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 adverb
unlawfulness noun

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The unlawful taking of items from a machine or device that is operated or activated by the use of coins. Baltimore Sun Staff, Baltimore Sun, 17 Apr. 2026 Killing people on the high seas, supporting clearly unlawful military operations, and participating in the destruction of civilian infrastructure — while civilians are present — are wrong and un-American. Letters To The Editor, The Orlando Sentinel, 17 Apr. 2026 The class action suit, one of the first 4th Amendment challenges to immigration roving patrols, claims the arrests violated protections against unlawful searches and seizures. Ruben Vives, Los Angeles Times, 17 Apr. 2026 She was charged on state counts of second-degree murder, armed criminal action and unlawful use of a weapon, and in 2021 she was charged on a federal warrant with unlawful flight to avoid prosecution, Kansas City police said. Phil Helsel, NBC news, 17 Apr. 2026 See All Example Sentences for unlawful

Word History

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of unlawful was in the 14th century

Browse Nearby Words

Cite this Entry

“Unlawful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unlawful. Accessed 21 Apr. 2026.

Kids Definition

unlawful

adjective
un·​law·​ful ˌən-ˈlȯ-fəl How to pronounce unlawful (audio)
ˈən-
: not lawful : being against the law : illegal
unlawfully adverb
unlawfulness 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

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