From The Collaborative International Dictionary of English v.0.48:

Iron \I"ron\ ([imac]"[u^]rn), n. [OE. iren, AS. [imac]ren,
   [imac]sen, [imac]sern; akin to D. ijzer, OS. [imac]sarn, OHG.
   [imac]sarn, [imac]san, G. eisen, Icel. [imac]sarn, j[=a]rn,
   Sw. & Dan. jern, and perh. to E. ice; cf. Ir. iarann, W.
   haiarn, Armor. houarn.]
   [1913 Webster]
   1. (Chem.) The most common and most useful metallic element,
      being of almost universal occurrence, usually in the form
      of an oxide (as hematite, magnetite, etc.), or a hydrous
      oxide (as limonite, turgite, etc.). It is reduced on an
      enormous scale in three principal forms; viz., {cast
      iron}, steel, and wrought iron. Iron usually appears
      dark brown, from oxidation or impurity, but when pure, or
      on a fresh surface, is a gray or white metal. It is easily
      oxidized (rusted) by moisture, and is attacked by many
      corrosive agents. Symbol Fe (Latin Ferrum). Atomic number
      26, atomic weight 55.847. Specific gravity, pure iron,
      7.86; cast iron, 7.1. In magnetic properties, it is
      superior to all other substances.
      [1913 Webster]

   Note: The value of iron is largely due to the facility with
         which it can be worked. Thus, when heated it is
         malleable and ductile, and can be easily welded and
         forged at a high temperature. As cast iron, it is
         easily fusible; as steel, is very tough, and (when
         tempered) very hard and elastic. Chemically, iron is
         grouped with cobalt and nickel. Steel is a variety of
         iron containing more carbon than wrought iron, but less
         that cast iron. It is made either from wrought iron, by
         roasting in a packing of carbon (cementation) or from
         cast iron, by burning off the impurities in a Bessemer
         converter (then called Bessemer steel), or directly
         from the iron ore (as in the Siemens rotatory and
         generating furnace).
         [1913 Webster]

   2. An instrument or utensil made of iron; -- chiefly in
      composition; as, a flatiron, a smoothing iron, etc.
      [1913 Webster]

            My young soldier, put up your iron.   --Shak.
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   3. pl. Fetters; chains; handcuffs; manacles.
      [1913 Webster]

            Four of the sufferers were left to rot in irons.
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   4. Strength; power; firmness; inflexibility; as, to rule with
      a rod of iron.
      [1913 Webster]

   5. (Golf) An iron-headed club with a deep face, chiefly used
      in making approaches, lifting a ball over hazards, etc.
      [Webster 1913 Suppl.]

   Bar iron. See Wrought iron (below).

   Bog iron, bog ore; limonite. See Bog ore, under Bog.

   Cast iron (Metal.), an impure variety of iron, containing
      from three to six percent of carbon, part of which is
      united with a part of the iron, as a carbide, and the rest
      is uncombined, as graphite. It there is little free
      carbon, the product is white iron; if much of the carbon
      has separated as graphite, it is called gray iron. See
      also Cast iron, in the Vocabulary.

   Fire irons. See under Fire, n.

   Gray irons. See under Fire, n.

   Gray iron. See Cast iron (above).

   It irons (Naut.), said of a sailing vessel, when, in
      tacking, she comes up head to the wind and will not fill
      away on either tack.

   Magnetic iron. See Magnetite.

   Malleable iron (Metal.), iron sufficiently pure or soft to
      be capable of extension under the hammer; also, specif., a
      kind of iron produced by removing a portion of the carbon
      or other impurities from cast iron, rendering it less
      brittle, and to some extent malleable.

   Meteoric iron (Chem.), iron forming a large, and often the
      chief, ingredient of meteorites. It invariably contains a
      small amount of nickel and cobalt. Cf. Meteorite.

   Pig iron, the form in which cast iron is made at the blast
      furnace, being run into molds, called pigs.

   Reduced iron. See under Reduced.

   Specular iron. See Hematite.

   Too many irons in the fire, too many objects or tasks
      requiring the attention at once.

   White iron. See Cast iron (above).

   Wrought iron (Metal.), the purest form of iron commonly
      known in the arts, containing only about half of one per
      cent of carbon. It is made either directly from the ore,
      as in the Catalan forge or bloomery, or by purifying
      (puddling) cast iron in a reverberatory furnace or
      refinery. It is tough, malleable, and ductile. When formed
      into bars, it is called bar iron.
      [1913 Webster]

From The Collaborative International Dictionary of English v.0.48:

Iron \I"ron\ ([imac]"[u^]rn), a. [AS. [imac]ren, [imac]sen. See
   Iron, n.]
   [1913 Webster]
   1. Of, or made of iron; consisting of iron; as, an iron bar,
      [1913 Webster]

   2. Resembling iron in color; as, iron blackness.
      [1913 Webster]

   3. Like iron in hardness, strength, impenetrability, power of
      endurance, insensibility, etc.; as:
      (a) Rude; hard; harsh; severe.
          [1913 Webster]

                Iron years of wars and dangers.   --Rowe.
          [1913 Webster]

                Jove crushed the nations with an iron rod.
      (b) Firm; robust; enduring; as, an iron constitution.
      (c) Inflexible; unrelenting; as, an iron will.
      (d) Not to be broken; holding or binding fast; tenacious.
          "Him death's iron sleep oppressed." --Philips.
          [1913 Webster]

   Note: Iron is often used in composition, denoting made of
         iron, relating to iron, of or with iron; producing
         iron, etc.; resembling iron, literally or figuratively,
         in some of its properties or characteristics; as,
         iron-shod, iron-sheathed, iron-fisted, iron-framed,
         iron-handed, iron-hearted, iron foundry or
         [1913 Webster]

   Iron age.
      (a) (Myth.) The age following the golden, silver, and
          bronze ages, and characterized by a general
          degeneration of talent and virtue, and of literary
          excellence. In Roman literature the Iron Age is
          commonly regarded as beginning after the taking of
          Rome by the Goths, A. D. 410.
      (b) (Arch[ae]ol.) That stage in the development of any
          people characterized by the use of iron implements in
          the place of the more cumbrous stone and bronze.

   Iron cement, a cement for joints, composed of cast-iron
      borings or filings, sal ammoniac, etc.

   Iron clay (Min.), a yellowish clay containing a large
      proportion of an ore of iron.

   Iron cross, a German, and before that Prussian, order of
      military merit; also, the decoration of the order.

   Iron crown, a golden crown set with jewels, belonging
      originally to the Lombard kings, and indicating the
      dominion of Italy. It was so called from containing a
      circle said to have been forged from one of the nails in
      the cross of Christ.

   Iron flint (Min.), an opaque, flintlike, ferruginous
      variety of quartz.

   Iron founder, a maker of iron castings.

   Iron foundry, the place where iron castings are made.

   Iron furnace, a furnace for reducing iron from the ore, or
      for melting iron for castings, etc.; a forge; a
      reverberatory; a bloomery.

   Iron glance (Min.), hematite.

   Iron hat, a headpiece of iron or steel, shaped like a hat
      with a broad brim, and used as armor during the Middle

   Iron horse, a locomotive engine. [Colloq.]

   Iron liquor, a solution of an iron salt, used as a mordant
      by dyers.

   Iron man (Cotton Manuf.), a name for the self-acting
      spinning mule.

   Iron mold or Iron mould, a yellow spot on cloth stained
      by rusty iron.

   Iron ore (Min.), any native compound of iron from which the
      metal may be profitably extracted. The principal ores are
      magnetite, hematite, siderite, limonite, G["o]thite,
      turgite, and the bog and clay iron ores.

   Iron pyrites (Min.), common pyrites, or pyrite. See

   Iron sand, an iron ore in grains, usually the magnetic iron
      ore, formerly used to sand paper after writing.

   Iron scale, the thin film which forms on the surface of
      wrought iron in the process of forging. It consists
      essentially of the magnetic oxide of iron, Fe3O4.

   Iron works, a furnace where iron is smelted, or a forge,
      rolling mill, or foundry, where it is made into heavy
      work, such as shafting, rails, cannon, merchant bar, etc.
      [1913 Webster]

From The Collaborative International Dictionary of English v.0.48:

Iron \I"ron\, v. t. [imp. & p. p. Ironed; p. pr. & vb. n.
   [1913 Webster]
   1. To smooth with an instrument of iron; especially, to
      smooth, as cloth, with a heated flatiron; -- sometimes
      used with out.
      [1913 Webster]

   2. To shackle with irons; to fetter or handcuff. "Ironed like
      a malefactor." --Sir W. Scott.
      [1913 Webster]

   3. To furnish or arm with iron; as, to iron a wagon.

   iron out differences resolve differences; settle a dispute.
      [PJC] Ironbark

From The Collaborative International Dictionary of English v.0.48:

Irony \I"ron*y\, a. [From Iron.]
   [1913 Webster]
   1. Made or consisting of iron; partaking of iron; iron; as,
      irony chains; irony particles; -- In this sense iron is
      the more common term. [R.] --Woodward.
      [1913 Webster +PJC]

   2. Resembling iron in taste, hardness, or other physical
      [1913 Webster]
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