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dimension

  1. [physics] A length of a certain distance and bearing.
  2. [physics] The area over which an entity extends.
  3. [physics] The number of axes that are essential to the existence of an entity in space. For example, the identity of a location on a plane requires two axes; therefore, a plane exists in the second dimension, and an entity with two axes, or dimensions, may be uniquely identified as a plane. dimension Illustration