mens rea /'menz-'rē-ə, -'rā-/ n pl men·tes re·ae /'men-ˌtēz-'rē-ˌē, 'men-ˌtās-'rā-ˌī/ [New Latin, literally, guilty mind]: a culpable mental state; esp: one involving intent or knowledge and forming an element of a criminal offense
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.