Pronunciation: (di-mär'kāt, dē'mär-kāt"), [key]
—v.t., -cat•ed, -cat•ing.
1. to determine or mark off the boundaries or limits of: to demarcate a piece of property.
2. to separate distinctly: to demarcate the lots with fences.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.