(n) the social process of becoming or being made marginal (especially as a group within the larger society), Syn. marginalisation, Example:the marginalization of the underclass; the marginalization of literature
n. (Economics) The increase in total cost of production as a result of producing one more unit of output; since certain ovrhead costs are fixed, the marginal cost is almost aways less than the total per-unit cost of production averaged over all units produced. Syn. -- incremental cost, differential cost. [ WordNet 1.5 ]