Real Dictionary

socialist realism in American English
a style of writing, painting, etc., established in the Soviet Union in the 1930s, typically depicting laborers and other members of a communist society in a heroic or idealized fashion
noun: a state-approved artistic or literary style in some socialist countries, as the U.S.S.R., that characteristically celebrates an idealized vision of the life and industriousness of the workers

socialist realism in British English
noun: (in Communist countries, esp formerly) the doctrine that art, literature, etc should present an idealized portrayal of reality, which glorifies the achievements of the Communist Party