What does unlawful mean?
Unlawful is an adjective meaning that an action, condition, or arrangement is contrary to law or otherwise lacks legal authorization. It is especially common in legal, governmental, and regulatory contexts, as in “unlawful entry,” “unlawful use of force,” and the finding that an activity is unlawful. Although it closely overlaps with illegal, unlawful can also refer more broadly to conduct that a valid law, regulation, or other binding rule prohibits, including rules created under established legal authority. In ordinary conversation, illegal is often the more familiar choice, while unlawful tends to sound more formal and institutional. The word is used in both British and American English and can carry a strong connotation of deliberate wrongdoing, although legal findings do not always depend on proving intent. Unlawful is especially useful when the focus is the legal status of conduct rather than the identity of the law involved.
adjectiveContrary to or prohibited by law; illegal.
- Violating or contrary to the law.
- Not legally authorized or permitted.
"The court ruled that the company's handling of confidential records was unlawful."
"Accessing the private database without permission was unlawful."
"The new regulation prohibits several forms of unlawful discrimination in public places."
The prefix “un-” turns a simple legal status—lawfulness—into a powerful category of wrongdoing.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does unlawful come from?
Unlawful was formed in Middle English by combining the negative prefix un- with lawful, literally meaning “not lawful.” Lawful belongs to the long English family of words associated with law, which traces to Old English lagu, meaning “law” or “ordinance”; related forms include lawless, while legal comes through Latin from the same wider Indo-European vocabulary of law and prescription. Over time, unlawful became especially common in legal and administrative language for describing conduct contrary to an established rule or recognized legal authority.
Related word forms
How unlawful is actually used
Formal and especially common in legal, governmental, and regulatory contexts. Although widely understood in everyday speech, it is generally less conversational than “illegal.” It can refer to conduct forbidden by a valid law or rule without necessarily implying that the person acted with deliberately criminal intent.