https://www.merriam-webster.com/dictionary/illegal
The meaning of ILLEGAL is not according to or authorized by law : contrary to or in violation of a law : unlawful, illicit; also : not sanctioned by official rules (as of a game).
https://en.wiktionary.org/wiki/illegal
Feb 23, 2026 · According to Black's Law Dictionary (2nd edition), "illegal" may mean only that something lacks authority of the law or support from law (that is, that it's not leg
https://www.thefreedictionary.com/illegal
1. Prohibited by law. 2. Prohibited by official rules: an illegal pass in football. 3. Unacceptable to or not performable by a computer: an illegal operation.
https://dictionary.cambridge.org/dictionary/english/illegal
ILLEGAL definition: 1. not allowed by law: 2. not allowed by the rules of a sport: 3. an offensive word for someone…. Learn more.
https://www.wordreference.com/definition/illegal
Illegal, unlawful, illegitimate, illicit, criminal can all describe actions not in accord with law. Illegal refers most specifically to violations of statutes or, in organized athl
https://www.yourdictionary.com/illegal
Illegal definition: Prohibited by law.
https://www.oxfordlearnersdictionaries.com/us/definition/english/illegal_1
Definition of illegal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.