Pronunciation: (mär'ju-nl-īz"), [key]
—v.t., -ized, -iz•ing.
to place in a position of marginal importance, influence, or power: the government's attempts to marginalize criticism and restore public confidence. Also, esp. Brit.,mar'gin•al•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.