Simple past tense and past participle of fence in.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "fenced in" in a sentence
"This, by the way, was always the difficulty in carrying out the manual labor system in our schools, and constituted the grand distinction between negro-labor and student-labor: that the negro fenced in the field and hoed up the weeds; the student hoed up the cotton and fenced in the street."
"A battle on the low ground would have been favourable to cavalry; Harold therefore occupied and fenced in a hill, the hill of Senlac, the site in after days of the abbey and town of Battle, and there awaited the Norman attack."
"Difficulties assailed them at the outset, as many weeks passed before they got clear of Rockingham Bay, its rivers, swamps, and dense scrubs fenced in by a mountain chain."