The New Dictionary of Cultural Literacy, Third Edition. 2002.
conscientious objector
A person who refuses to render military service on the grounds of moral principle or religious belief. A CO must demonstrate a sincere, active, and long-standing objection in order to receive an exemption from armed service. The United States and some European governments officially recognize CO status; approved COs are usually required to perform social service or noncombat military service in place of armed duty. (See alsodraft, draft dodger, andSelective Service System.)