The Oxford Thesaurus An A-Z Dictionary of Synonyms - enclosure n.

1) fold, pen, cote, run, sty, yard, farmyard, barnyard, courtyard, quadrangle or quad, square, compound, Brit close, US and Canadian corral: We had trouble keeping the dogs in the enclosure. 2) fence, wall, rail, railing, barrier, hedge, barricade, boundary: The buildings serve as an enclosure.