1150-1200;late Middle Englishpynfold for *pindfold, equivalent to Old Englishpynd(an) to impound (derivative of pundpound3) + fold2; replacing Middle Englishpo(u)n(d)fold(e), late Old Englishpundfald
British Dictionary definitions for pinfold
pinfold
/ˈpɪnˌfəʊld/
noun
1.
a pound for stray cattle
a fold or pen for sheep or cattle
verb
2.
(transitive) to gather or confine in or as if in a pinfold