Source : Webster's Revised Unabridged Dictionary (1913)

Lock \Lock\, n. [AS. loc inclosure, an inclosed place, the
   fastening of a door, fr. l[=u]can to lock, fasten; akin to
   OS. l[=u]kan (in comp.), D. luiken, OHG. l[=u]hhan, Icel.
   l?ka, Goth. l[=u]kan (in comp.); cf. Skr. ruj to break. Cf.
   {Locket}.]
   1. Anything that fastens; specifically, a fastening, as for a
      door, a lid, a trunk, a drawer, and the like, in which a
      bolt is moved by a key so as to hold or to release the
      thing fastened.

   2. A fastening together or interlacing; a closing of one
      thing upon another; a state of being fixed or immovable.

            Albemarle Street closed by a lock of carriages. --De
                                                  Quincey.

   3. A place from which egress is prevented, as by a lock.
      --Dryden.

   4. The barrier or works which confine the water of a stream
      or canal.

   5. An inclosure in a canal with gates at each end, used in
      raising or lowering boats as they pass from one level to
      another; -- called also {lift lock}.

   6. That part or apparatus of a firearm by which the charge is
      exploded; as, a matchlock, flintlock, percussion lock,
      etc.

   7. A device for keeping a wheel from turning.

   8. A grapple in wrestling. --Milton.

   {Detector lock}, a lock containing a contrivance for showing
      whether it as has been tampered with.

   {Lock bay} (Canals), the body of water in a lock chamber.

   {Lock chamber}, the inclosed space between the gates of a
      canal lock.

   {Lock nut}. See {Check nut}, under {Check}.

   {Lock plate}, a plate to which the mechanism of a gunlock is
      attached.

   {Lock rail} (Arch.), in ordinary paneled doors, the rail
      nearest the lock.

   {Lock rand} (Masonry), a range of bond stone. --Knight.

   {Mortise lock}, a door lock inserted in a mortise.

   {Rim lock}, a lock fastened to the face of a door, thus
      differing from a {mortise lock}.

Nut \Nut\, n. [OE. nute, note, AS. hnutu; akin to D. noot, G.
   nuss, OHG. nuz, Icel. hnot, Sw. n["o]t, Dan. n["o]d.]
   1. (Bot.) The fruit of certain trees and shrubs (as of the
      almond, walnut, hickory, beech, filbert, etc.), consisting
      of a hard and indehiscent shell inclosing a kernel.

   2. A perforated block (usually a small piece of metal),
      provided with an internal or female screw thread, used on
      a bolt, or screw, for tightening or holding something, or
      for transmitting motion. See Illust. of lst {Bolt}.

   3. The tumbler of a gunlock. --Knight.

   4. (Naut.) A projection on each side of the shank of an
      anchor, to secure the stock in place.

   {Check nut}, {Jam nut}, {Lock nut}, a nut which is screwed up
      tightly against another nut on the same bolt or screw, in
      order to prevent accidental unscrewing of the first nut.
      

   {Nut buoy}. See under {Buoy}.

   {Nut coal}, screened coal of a size smaller than stove coal
      and larger than pea coal; -- called also {chestnut coal}.
      

   {Nut crab} (Zo["o]l.), any leucosoid crab of the genus
      {Ebalia} as, {Ebalia tuberosa} of Europe.

   {Nut grass} (Bot.), a plant of the Sedge family ({Cyperus
      rotundus}, var. Hydra), which has slender rootstocks
      bearing small, nutlike tubers, by which the plant
      multiplies exceedingly, especially in cotton fields.

   {Nut lock}, a device, as a metal plate bent up at the
      corners, to prevent a nut from becoming unscrewed, as by
      jarring.