Main Entry: pe·rim·e·ter

Pronunciation: \pə-ˈri-mə-tər\

Function: noun

Etymology: Middle English perimetre, from Latin perimetros, from Greek, from peri- + metron measure — more at measure

Date: 15th century

1 a : the boundary of a closed plane figure b : the length of a perimeter
2 : a line or strip bounding or protecting an area
3 : outer limits —often used in plural
4 : the part of a basketball court outside the three-point line