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.

Blockading merchant ships violates the UN Convention on the Law of the Sea and is illegal, she noted.

From Barron's • Apr. 14, 2026

Prosecutors charged Hui and Evergrande with fraud, illegal information disclosures and corporate bribery.

From The Wall Street Journal • Apr. 14, 2026

“Focusing on illegal wildlife trade is not enough,” said Meredith Gore, a conservation criminologist at the University of Maryland and a co-author of the study.

From Los Angeles Times • Apr. 13, 2026

It is illegal under Philippine law and widely banned across Southeast Asia because of its destructive impact on marine ecosystems.

From BBC • Apr. 13, 2026

In 1780, Pennsylvania had made slavery illegal, the first state to do so.

From "In the Shadow of Liberty" by Kenneth C. Davis

Vocabulary lists containing illegal

List 3

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