Russian Revolution

noun

Also called February Revolution. the uprising in Russia in March, 1917 (February Old Style), in which the Czarist government collapsed and a provisional government was established.
Also called October Revolution. the overthrow of this provisional government by a coup d'état on November 7, 1917 (October 25 Old Style), establishing the Soviet government.

British Dictionary definitions for russian revolution

Russian Revolution

noun

Also called (reckoned by the Julian calendar): February Revolution the uprising in Russia in March 1917, during which the tsar abdicated and a provisional government was set up
Also called (reckoned by the Julian calendar): October Revolution the seizure of power by the Bolsheviks under Lenin in November 1917, transforming the uprising into a socialist revolution. This was followed by a period of civil war against counter-revolutionary armies (1918–22), which ended in eventual victory for the Bolsheviks

Cultural definitions for russian revolution

Russian Revolution

A revolution in Russia in 1917–1918, also called the October Revolution, that overthrew the czar and brought the Bolsheviks, a Communist party led by Lenin, to power. The revolution was encouraged by Russian setbacks in World War I.