Is it illegal to remove catalytic converter in california. Prohibited by official rules: an illegal pass in football. 2. Illegal refers most specifically to violations of statutes or, in organized athletics, codified rules: an illegal seizure of property; an illegal block (in football). ILLEGAL definition: forbidden by law or statute. Illegal, unlawful, illegitimate, illicit, criminal can all describe actions not in accord with law. 1. Unacceptable to or not performable by a computer: an illegal operation. See examples of illegal used in a sentence. Learn more. not allowed by the rules of a sport: 3. Definition of illegal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 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). 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). 3. Feb 23, 2026 ยท 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 legal), not that it's against the law, but that in ordinary usage it means a violation of the law. Prohibited by law. not allowed by law: 2. an offensive word for someone…. ILLEGAL definition: 1. .
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