Longman Dictionary of Contemporary English homepage

Topic: MATHS

Date: 1500-1600
Language: French
Origin: périmètre, from Latin, from Greek, from peri- ( PERICARDIUM) + metron 'measure'

perimeter

 noun
     
pe‧rim‧e‧ter [countable]
1 the border around an enclosed area such as a military camp
perimeter of
the perimeter of the airfield
perimeter fence/wall
A mine blew a hole in the perimeter wall.
2 the whole length of the border around an area or shape
perimeter of
Calculate the perimeter of the rectangle.
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