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de·mar·ca·tionalso de·mar·ka·tion (dē′mär-kā′shən)
1. The setting or marking of boundaries or limits.
2. A separation; a distinction: a line of demarcation between two rock strata.
[Spanish demarcación, from demarcar, to mark boundaries : de-, off (from Latin dē-; see de-) + marcar, to mark (from Italian marcare, from Old Italian, of Germanic origin; see merg- in Indo-European roots).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.