barrier

Meanings

1. 1
   noun

   any condition that makes it difficult to make progress or to achieve an objective

   intolerance is a barrier to understanding

2. 2
   noun

   A structure that bars passage.

   The bus went through a railway barrier and was hit by a train.

3. 3
   noun

   An obstacle or impediment.

   Even a small fee can be a barrier for some students.

4. 4
   noun

   A boundary or limit.

   Few marathon runners break the three-hour time barrier.

5. 5
   noun

   a structure or object that impedes free movement

6. 6
   noun

   anything serving to maintain separation by obstructing vision or access

7. 7
   noun

   A node (in government and binding theory) said to intervene between other nodes A and B if it is a potential governor for B, c-commands B, and does not c-command A.

8. 8
   noun

   A separation between two areas of the body where specialized cells allow the entry of certain substances but prevent the entry of others.

Etymology

From Middle English barryer, barrere, barryȝer, from Old French barriere (compare French barrière), from Old French barre (“bar”).