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).

ILLEGAL definition: 1. not allowed by law: 2. not allowed by the rules of a sport: 3. an offensive word for someone…. Learn more.

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.

Illegal immigration, or unauthorized immigration, occurs when foreign nationals, known as aliens or non-citizens [1], violate US immigration laws by entering the United States unla

Dec 11, 2025 · 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

Definition of illegal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Master the word "ILLEGAL" in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource.

ILLEGAL definition: forbidden by law or statute. See examples of illegal used in a sentence.

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

ILLEGAL meaning: 1 : not allowed by the law not legal; 2 : not allowed by the rules in a game