Definitions for: Pin

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

Webster (1913) Definition: 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
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.

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
(b) (Fireworks) A small coil which revolves on a common
pin and makes a wheel of yellow or colored fire.

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.

Synonyms: bowling pin, fall, flag, immobilise, immobilize, oarlock, peg, peg, peg, personal identification number, pin down, PIN number, pin up, pivot, rowlock, stick, thole, tholepin, trap

Antonyms: unpin

See Also: aggress, attach, attack, axis, axis of rotation, barrette, bitt pin, bowling equipment, breastpin, broach, brooch, cylinder lock, dinghy, dory, duckpin, empale, fasten, fastener, fastening, fix, fixing, fulcrum, golf equipment, gudgeon pin, hairpin, hatpin, head, headpin, holder, holdfast, identification, impale, jewellery, jewelry, kingpin, leg, linchpin, lynchpin, mark, marker, marking, ninepin, nog, pinhead, pintle, point, rivet, rowboat, safety pin, scarfpin, scatter pin, secure, shank, skewer, skewer, skittle, skittle pin, spike, spit, stem, stickpin, straight pin, takedown, tenpin, tie tack, tiepin, toggle, transfix, triumph, tumbler, victory, wrestling match, wrist pin

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