General English

General Science

  • noun a structure that prevents something going from one place to another.


  • noun something such as a wall that prevents the movement of something else
  • noun something that prevents a person from making progress


  • noun anything which makes it difficult for someone to do something, especially to send goods from one place to another


  • noun something which restricts commercial activity, such as laws restricting movement of capital or labour


  • A device, structure, or material that obstructs or impedes. For instance, an insulator serving as a barrier to electricity.
  • In a semiconductor, the region of a pn junction that is free, or depleted, of charge carriers. This is a deprecated term, as are barrier layer, barrier region, or blocking layer. depletion layer, or space charge layer are the more proper terms to use for this concept.


  • noun an obstacle which prevents forward movement