illegal

[ih-lee-guhl] / ɪˈli gəl /

ADJECTIVE

against the law

Synonyms

STRONGEST

banned criminal illegitimate illicit irregular outlawed prohibited smuggled unauthorized unconstitutional unlawful unlicensed unwarranted wrongful

WEAK

actionable black-market bootleg contraband crooked extralegal felonious forbidden heavy hot interdicted lawless not approved not legal outside the law proscribed prosecutable racket shady sub-rosa taboo under-the-table unofficial unwarrantable verboten violating wildcat

Antonyms

STRONGEST

authorized blessed ethical good justifiable lawful legal legitimate moral permitted right warranted

WEAK

allowed permissible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Tanisa is not a regulated immigration adviser and as a result it is illegal for her to offer immigration advice.

From BBC • Apr. 15, 2026

The government sued Live Nation and Ticketmaster, alleging the company maintained an illegal monopoly over the live entertainment industry.

From Barron's • Apr. 15, 2026

Live Nation denied that it was an illegal monopoly and said the states’ case exaggerated its market power.

From The Wall Street Journal • Apr. 15, 2026

Shares of Live Nation sank on Wednesday after a jury found that the Ticketmaster parent had acted as an illegal monopoly over the ticketing industry, according to reports.

From MarketWatch • Apr. 15, 2026

Anthony had been accused of breaking a law that prohibited willful and knowing illegal voting; she argued that she didn’t break the law because she believed her ballot was legal.

From "Votes for Women!" by Winifred Conkling

Vocabulary lists containing illegal

List 3

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