Wiktionary
fence off
vb. To enclose an area within a fence.
Usage examples of "fence off".
Wearing the goggles, he saw the battered fence off to his left, and walked toward it.
We should fence off the parts of the palace that lead to the edge.
He meant to fence off side canyons and to segregate droves of his hogs, and to raise abundance of corn for winter feed.
They were just coming out of the trees that hedged the shore when Don saw a fence off to the right.