# perimeter

[ puh-rim-i-ter ]

/ pəˈrɪm ɪ tər /

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noun

the border or outer boundary of a two-dimensional figure.

the length of such a boundary.

a line bounding or marking off an area.

the outermost limits.

Military. a fortified boundary that protects a troop position.

Ophthalmology. an instrument for determining the peripheral field of vision.

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## Origin of perimeter

## OTHER WORDS FROM perimeter

pe·rim·e·ter·less, adjectivepe·rim·e·tral, per·i·met·ric [per-uh-me-trik], /ˌpɛr əˈmɛ trɪk/, per·i·met·ri·cal, adjectiveper·i·met·ri·cal·ly, adverbpe·rim·e·try, noun## WORDS THAT MAY BE CONFUSED WITH perimeter

parameter, perimeterDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## British Dictionary definitions for perimeter

perimeter

/ (pəˈrɪmɪtə) /

noun

maths

- the curve or line enclosing a plane area
- the length of this curve or line

- any boundary around something, such as a field
- (as modifier)a perimeter fence; a perimeter patrol

a medical instrument for measuring the limits of the field of vision

## Derived forms of perimeter

perimetric (ˌpɛrɪˈmɛtrɪk) or perimetrical, adjectiveperimetrically, adverbperimetry, noun## Word Origin for perimeter

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

## Scientific definitions for perimeter

perimeter

[ pə-rĭm′ĭ-tər ]

The sum of the lengths of the segments that form the sides of a polygon.

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

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.