Pin (?), v. t. (Metal Working) To peen.
Pin (?), v. t. [Cf. Pen to confine, or Pinfold.] To inclose; to
confine; to pen; to pound.
Pin, n. [OE. pinne, AS. pinn a pin, peg; cf. D. pin, G. pinne, Icel.
pinni, W. pin, Gael. & Ir. pinne; all fr. L. pinna a pinnacle, pin,
feather, perhaps orig. a different word from pinna feather. Cf. Fin of
a fish, Pen a feather.] 1. A piece of wood, metal, etc., generally
cylindrical, used for fastening separate articles together, or as a
support by which one article may be suspended from another; a peg; a
bolt.
With pins of adamant And chains they made all fast.
Milton.
2. Especially, a small, pointed and headed piece of brass or other wire
(commonly tinned), largely used for fastening clothes, attaching
papers, etc.