(a.) Not according to or authorized by, law; specifically, contrary to or in violation of, human law; unlawful; illicit; hence, immoral; as, an illegal act; illegal trade; illegal love.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). illegal. Retrieved September 20, 2026, from http://smartdefine.org/illegal/definitions/2018942 |
| Chicago | Webster's. 2011. "illegal" http://smartdefine.org/illegal/definitions/2018942 (accessed September 20, 2026). |
| Harvard | Webster's 2011, illegal, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/illegal/definitions/2018942>. |
| MLA | Webster's. "illegal" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/illegal/definitions/2018942> |