| Russian Revolution (def. 1). |
| 1. | 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. |
| 2. | 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. |
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.