WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the social process of becoming or being made marginal (especially as a group within the larger society)
Word Usage
"The Tigers, listed as a terror group by many Western nations, have been fighting since 1983 for an ethnic Tamil state in the north and east after decades of what they call marginalisation by governments dominated by the Sinhalese majority."