illegal /iˈli:ɡəl/ adj. 不合法的，非法的：illegal drugs非法药品；an illegal immigrant非法移民It’s illegal to park your car here. 你把汽车停在这儿是不合法的。It's illegal for people under 17 to drive a car in Britain.在英国，不满17岁的人驾驶车辆是违法的。Their action was judged illegal by the International Court.国际法院裁定他们的行动非法。