1. [n]  a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing
2. [n]  a club-shaped wooden object used in bowling; set up in groups as a target
3. [n]  a small slender (often pointed) piece of wood or metal used to support or fasten or attach things
4. [n]  a piece of jewelry that is pinned onto the wearer's garment
5. [n]  flagpole used to mark the position of the hole on a golf green
6. [n]  cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown
7. [n]  axis consisting of a short shaft that supports something that turns
8. [n]  informal terms of the leg; "fever left him weak on his sticks"
9. [n]  a number you choose and use to gain access to various accounts
10. [n]  small markers inserted into a surface to mark scores or define locations etc.
11. [n]  when a wrestler's shoulders are forced to the mat
12. [v]  immobilize a piece, in chess
13. [v]  to hold fast or prevent from moving; "The child was pinned under the fallen tree"
14. [v]  pierce with a pin; "pin down the butterfly"
15. [v]  attach with or as if with a pin
16. [v]  attach or fasten with pins

1. \Pin\, v. t. (Metal Working)
   To peen.
   

2. \Pin\, v. t. [Cf. {Pen} to confine, or {Pinfold}.]
   To inclose; to confine; to pen; to pound.
   

3. \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.
   3. Hence, a thing of small value; a trifle.
            He . . . did not care a pin for her.  --Spectator.
   4. That which resembles a pin in its form or use; as:
      (a) A peg in musical instruments, for increasing or
          relaxing the tension of the strings.
      (b) A linchpin.
      (c) A rolling-pin.
      (d) A clothespin.
      (e) (Mach.) A short shaft, sometimes forming a bolt, a
          part of which serves as a journal. See Illust. of
          {Knuckle joint}, under {Knuckle}.
      (f) (Joinery) The tenon of a dovetail joint.
   5. One of a row of pegs in the side of an ancient drinking
      cup to mark how much each man should drink.
   6. The bull's eye, or center, of a target; hence, the center.
      [Obs.] ``The very pin of his heart cleft.'' --Shak.
   7. Mood; humor. [Obs.] ``In merry pin.'' --Cowper.
   8. (Med.) Caligo. See {Caligo}. --Shak.
   9. An ornament, as a brooch or badge, fastened to the
      clothing by a pin; as, a Masonic pin.
   10. The leg; as, to knock one off his pins. [Slang]
   {Banking pin} (Horol.), a pin against which a lever strikes,
      to limit its motion.
   {Pin drill} (Mech.), a drill with a central pin or projection
      to enter a hole, for enlarging the hole, or for sinking a
      recess for the head of a bolt, etc.; a counterbore.
   {Pin grass}. (Bot.) See {Alfilaria}.
   {Pin hole}, a small hole made by a pin; hence, any very small
      aperture or perforation.
   {Pin lock}, a lock having a cylindrical bolt; a lock in which
      pins, arranged by the key, are used instead of tumblers.
   {Pin money}, an allowance of money, as that made by a husband
      to his wife, for private and personal expenditure.
   {Pin rail} (Naut.), a rail, usually within the bulwarks, to
      hold belaying pins. Sometimes applied to the {fife rail}.
      Called also {pin rack}.
   {Pin wheel}.
       (a) A contrate wheel in which the cogs are cylindrical
           pins.
       (b) (Fireworks) A small coil which revolves on a common
           pin and makes a wheel of yellow or colored fire.
   

4. \Pin\, v. t. [imp. & p. p. {Pinned}; p. pr. & vb. n.
   {Pinning}.] [See {Pin}, n.]
   To fasten with, or as with, a pin; to join; as, to pin a
   garment; to pin boards together. ``As if she would pin her to
   her heart.'' --Shak.
   {To pin one's faith upon}, to depend upon; to trust to.
   

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