perimeter

An agent on the outer perimeter radios in that the motorcade is in sight.

Outside the lodge, running along its perimeter, was a small ditch lined by posts topped by a chest-high wooden beam.

SWAT teams moved in and tear gas canisters were heard from the perimeter of what had essentially become a militarized zone.

On Wednesday night, as the main stage acts raged, Capt. Chris Slayman cruised the perimeter of the Gathering.

When the Stalwart vanguard reached the perimeter, their ranks broke in confusion.

Loud-speaker trucks roamed along the perimeter, reassuring the people.

The line bounding a circle is termed its circumference or periphery and sometimes the perimeter.

The point which the mirror occupies on the arc of the perimeter, indicates the squint angle.

Four tangential slots (C) are cut into the perimeter of the pulley (B), and in each is a hardened steel roller (D).

I was surprised to find out that this city within its protective wall—the perimeter—is the only one on the planet.