Gang' of Four'
a group of four radical members of the Chinese Communist party who were leaders of the Cultural Revolution and who were purged and imprisoned after the death of Mao Zedong: Jiang Qing (widow of Mao), Wang Hongwen, Yao Wenyuan, and Zhang Chunqiao. Cf. Cultural Revolution, Red Guard.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.