We moved into thicker vegetation and set up in a tight, defensive perimeter.

The men were in a tight perimeter in front of the entrance to the bunker.

We were forced back into a tighter and tighter perimeter.

He watched guards in the distance rushing to set up a tight perimeter around the captive members of the team.

The soldiers were pinned down in a tight perimeter.

They were caught flat-footed, thinking he would stay behind the dumpster long enough for them to throw a tight perimeter around him.

We'll set up a tight perimeter there and signal the ship.

Chase pulled his troops back into a tight perimeter.

They had drawn in to a tighter perimeter, decided finally to dock, which seemed to him military insanity, a risk he did not understand.

They're scoping the building now, looking to form a very tight perimeter, probably inside the building.