Breadcrumb Home > Dictionary > Index D demarcation: Meaning and Definition of Find definitions for: de•mar•ca•tion Pronunciation: (dē"mär-kā'shun), [key] — n. the determining and marking off of the boundaries of something. separation by distinct boundaries: line of demarcation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: demarcation (Thesaurus) demarcate demarcative TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: rort Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language