'Perimeter' definitions:

Definition of 'perimeter'

From: WordNet
noun
The boundary line or the area immediately inside the boundary [syn: margin, border, perimeter]
noun
A line enclosing a plane areas
noun
The size of something as given by the distance around it [syn: circumference, perimeter]

Definition of 'Perimeter'

From: GCIDE
  • Perimeter \Per*im"e*ter\, n. [Gr. ?; peri` around + ? measure: cf. F. p['e]rim[`e]tre.]
  • 1. (Geom.) The outer boundary of a body or figure, or the sum of all the sides. [1913 Webster]
  • 2. An instrument for determining the extent and shape of the field of vision. [1913 Webster] Perimetric

Synonyms of 'perimeter'

From: Moby Thesaurus