secession

noun

1. an act or instance of seceding.
2. (often initial capital letter) U.S. History. the withdrawal from the Union of 11 Southern states in the period 1860–61, which brought on the Civil War.
3. (usually initial capital letter) Fine Arts. a style of art in Germany and Austria concurrent with and related to Art Nouveau.

noun

1. the act of seceding
2. (often capital) mainly US the withdrawal in 1860–61 of 11 Southern states from the Union to form the Confederacy, precipitating the American Civil War

n.1530s, from Latin secessionem (nominative secessio) “a withdrawal, separation; political withdrawal, insurrection, schism,” noun of action from past participle stem of secedere “secede,” from se- “apart” (see secret) + cedere “to go” (see cede). Originally in a Roman historical context, “temporary migration of plebeians from the city to compel patricians to address their grievances;” modern use in reference to religious or political unions dates from 1650s. The withdrawal from the United States of eleven southern states in 1860 and 1861. The seceding states formed a government, the Confederacy, in early 1861. Hostilities against the remaining United States, the Union, began in April 1861 (see Fort Sumter), and the Civil War followed.