Latin: a mind to be accused; a guilty mind. In many systems of law, criminal guilt requires not only that an act was performed (actus reus) but also that it was performed with an appropriate mind-set. Having the intention to perform a crime is sufficient, but not necessary to mens rea. Foreseeing a side-effect such as a death could count, even if the death is not intended, and reckless negligence could also constitute mens rea.

The Oxford Dictionary of Philosophy. Copyright © 1994, 1996, 2005 by Oxford University Press. All rights reserved.