n. & v.
n. 1 a small enclosure for cows, sheep, poultry, etc. 2 a place of confinement. 3 an enclosure for sheltering submarines. 4 a Jamaican farm or plantation.
v.tr. (penned, penning) (often foll. by in, up) enclose or shut in a pen.
[ OE penn, of unkn. orig. ]