/ Dictionary / Index D demark: Meaning and Definition of Find definitions for: de•mark Pronunciation: (di-märk'), [key] — v.t. demarcate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. démarche* demarketing Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language