perimeter Meaning, Definition & Usage

  1. noun the boundary line or the area immediately inside the boundary
    border; margin.
  2. noun a line enclosing a plane areas
  3. noun the size of something as given by the distance around it
    circumference.

WordNet

Per*im"e*ter noun
Etymology
Gr. around + measure: cf. F. périmètre.
Definitions
  1. (Geom.) The outer boundary of a body or figure, or the sum of all the sides.
  2. An instrument for determining the extent and shape of the field of vision.

Webster 1913