The Collaborative International Dictionary
Secessionism
Secessionism \Se*ces"sion*ism\, n. The doctrine or policy of secession; the tenets of secession; the tenets of secessionists.
Wiktionary
secessionism
n. The doctrine or policy of secession.
WordNet
secessionism
n. a doctrine that maintains the right of secession
Usage examples of "secessionism".
It is that the Kashmiri secessionism is terrorism and a Pakistani creation.