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perimeter

[puh-rim-i-ter] /pəˈrɪm ɪ tər/
noun
1.
the border or outer boundary of a two-dimensional figure.
2.
the length of such a boundary.
3.
a line bounding or marking off an area.
4.
the outermost limits.
5.
Military. a fortified boundary that protects a troop position.
6.
Ophthalmology. an instrument for determining the peripheral field of vision.
Origin
1585-1595
1585-95; < French périmètre < Latin perimetros (feminine) < Greek perímetron (neuter). See peri-, -meter
Related forms
perimeterless, adjective
perimetral, perimetric
[per-uh-me-trik] /ˌpɛr əˈmɛ trɪk/ (Show IPA),
perimetrical, adjective
perimetrically, adverb
perimetry, noun
Can be confused
parameter, perimeter.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for perimeters
  • More and more townsfolk have awoken and come out to stand and watch respectfully from around the perimeters of the field.
  • Twelve unbearably gifted students are sitting around the table, and they appreciate having such perimeters established.
  • Instead they set up perimeters and controlled the scene.
  • If it is expanding it has perimeters, at present far beyond any ability of ours to measure.
  • Neither side should be expanding beyond its perimeters or attacking the other side.
  • The strategy is to search out pairs of circles with matching temperature patterns along their perimeters.
  • Basically perimeters that played all different positions.
  • Cell phone service can be difficult to navigate, and some carriers are inaccessible in the park's perimeters.
  • Once there, visitors can take a tour of the prison, visit the out buildings or stroll the perimeters of the island.
  • When you return and switch its mode, it reports how many times its perimeters had been compromised.
British Dictionary definitions for perimeters

perimeter

/pəˈrɪmɪtə/
noun
1.
(maths)
  1. the curve or line enclosing a plane area
  2. the length of this curve or line
2.
  1. any boundary around something, such as a field
  2. (as modifier): a perimeter fence, a perimeter patrol
3.
a medical instrument for measuring the limits of the field of vision
Derived Forms
perimetric (ˌpɛrɪˈmɛtrɪk), perimetrical, adjective
perimetrically, adverb
perimetry, noun
Word Origin
C16: from French périmètre, from Latin perimetros; see peri-, -meter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for perimeters

perimeter

n.

early 15c., "line around a figure or surface," from Latin perimetros, from Greek perimetron "circumference," from peri- "around" (see peri-) + metron "measure" (see meter (n.2)). Military sense of "boundary of a defended position" is attested from 1943.

Online Etymology Dictionary, © 2010 Douglas Harper
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perimeters in Medicine

perimeter pe·rim·e·ter (pə-rĭm'ĭ-tər)
n.

  1. The outer limits of an area; circumference.

  2. An instrument used to measure field of vision.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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perimeters in Science
perimeter
  (pə-rĭm'ĭ-tər)   
  1. The sum of the lengths of the segments that form the sides of a polygon.

  2. The total length of any closed curve, such as the circumference of a circle.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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