In general, a civilian is "a person who is not a member of the military or of a police or firefighting force", as defined by Merriam Webster's Dictionary. The term also includes chaplains and medical personnel who are not part of the organizations mentioned in the preceding sentence, as well as those who are not perpetrators, in order to distinguish between those who are law-abiding people and those who are dedicated criminals. From the U.S. Department of Defense perspective, Chapter 18 of Title 10 United States Code refers to non-military law enforcement officers as civilians, since they are employees rather than enlisted personnel, and also in order to distinguish itself from military police.