› the outer edge of an area of land or the border around it: Protesters cut a hole in the perimeter fence. A river runs along one side of the field's perimeter.Edges and extremities of objectsSurfaces of objects › specialized mathematics the length of the outer edge of a shapeEdges and extremities of objectsSurfaces of objectsParts of geometrical shapes

(Definition of perimeter from the Cambridge Advanced Learners Dictionary & Thesaurus
© Cambridge University Press)

What is the pronunciation of perimeter?
Browse related topics

You are looking at an entry to do with Geometry: parts of geometrical shapes, but you might be interested in these topics from the **Mathematics & arithmetic** topic area:

- Addition, subtraction, multiplication & division
- Averages
- Branches & types of mathematics
- Calculations & calculating
- Fractions
- Geometrical & mathematical instruments
- Geometrical shapes
- Geometry: bends, loops & curves
- Geometry: describing angles, lines & orientations
- Geometry: properties of circles & curves
- Mathematical symbols
- Numbering & counting
- Numbers generally
- Numbers: cardinal, including nought & zero
- Numbers: groups of things according to number
- Numbers: ordinal
- Numbers: single, double & multiple
- Numerical relationships
- Statistics
- Tables, graphs & diagrams
- Terms for numbers

Browse the Thesaurus

Add Cambridge dictionaries
to your browser
to your website

“perimeter”: synonyms and related words:

You can also find related words, phrases, and synonyms in the topics:

Read our blog about how the English language behaves.

Find words and meanings that have just started to be used in English, and let us know what you think of them.