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 perimeter2: a line or strip bounding or protecting an area3: outer limits —often used in plural4: the part of a basketball court outside the three-point line