Definition of


  1. (noun, artifact) a structure or object that impedes free movement
  2. (noun, cognition) any condition that makes it difficult to make progress or to achieve an objective
  3. (noun, object) anything serving to maintain separation by obstructing vision or access

via WordNet, Princeton University

Synonyms of Barrier


Origin of the word Barrier

  1. early 14c., from O.Fr. barriere "obstacle, gatekeeper," from barre "bar" (see bar (1)). First record of barrier reef is from 1805. more

via Online Etymology Dictionary, ©2001 Douglas Harper

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the property of being scanty or scattered; lacking denseness