secession
//sɪˈsɛʃən//
Noun
secessionSingular
secessionsPlural
1
The formal withdrawal of a state, region, or group from a larger political entity or organization.
The secession of the southern states led to a civil war.
2
The act of breaking away or separating from a union, alliance, or federation.
The secession of several states from the federation led to a political crisis.