| Noun | 1. | Khmer Rouge - a communist organization formed in Cambodia in 1970; became a terrorist organization in 1975 when it captured Phnom Penh and created a government that killed an estimated three million people; was defeated by Vietnamese troops but remained active until 1999 act of terrorism, terrorism, terrorist act - the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear Cambodia, Kampuchea, Kingdom of Cambodia - a nation in southeastern Asia; was part of Indochina under French rule until 1946 |