demarcation - definition and synonyms

noun formal 

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/ˌdiːmɑː(r)ˈkeɪʃ(ə)n/
singulardemarcation
pluraldemarcations
  1. [uncountable] the process of establishing borders or limits between areas, groups, or things
    1. a.
      [countable/uncountable] something that establishes borders or limits