Pronunciation: (si-sesh'un), [key]
1. an act or instance of seceding.
2. (often cap.) U.S. Hist.the withdrawal from the Union of 11 Southern states in the period 1860–61, which brought on the Civil War.
3. (usually cap.) Fine Arts.a style of art in Germany and Austria concurrent with and related to Art Nouveau.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.