noun
perimeter
pih-RIHM-ih-tuh
noun
1
The total distance around the edge of a shape.
"She measured the perimeter of the garden before ordering fencing."
2
The outer boundary or edge of an area, especially one that is guarded or fortified.
"Soldiers patrolled the perimeter of the base all night."
How to Use Perimeter
Learner’s notesIn plain EnglishThe outside edge of a shape or area, or the total length around it.
Common pairings
perimeter fence
secure the perimeter
perimeter of a triangle
Word Forms
perimeters plural
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She measured the _____ of the garden before ordering fencing.
Etymology
From Greek perimetros, from peri- ("around") + metron ("measure").