A duty, obligation or liability for which someone is held accountable.Why didn't you clean the house? That was your responsibility!The responsibility of the great states is to serve and not to dominate the world -
(military) The obligation to carry forward an assigned task to a successful conclusion. With responsibility goes authority to direct and take the necessary action to ensuresuccess. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms).
(military) The obligation for the proper custody, care, and safekeeping of property or funds entrusted to the possession or supervision of an individual. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms).