The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. t. [imp. & p. p. Forged; p. pr. & vb. n.
   Forging.] [F. forger, OF. forgier, fr. L. fabricare,
   fabricari, to form, frame, fashion, from fabrica. See
   Forge, n., and cf. Fabricate.]
   1. To form by heating and hammering; to beat into any
      particular shape, as a metal.
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            Mars's armor forged for proof eterne. --Shak.
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   2. To form or shape out in any way; to produce; to frame; to
      invent.
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            Those names that the schools forged, and put into
            the mouth of scholars, could never get admittance
            into common use.                      --Locke.
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            Do forge a life-long trouble for ourselves.
                                                  --Tennyson.
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   3. To coin. [Obs.] --Chaucer.
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   4. To make falsely; to produce, as that which is untrue or
      not genuine; to fabricate; to counterfeit, as, a
      signature, or a signed document.
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            That paltry story is untrue,
            And forged to cheat such gulls as you. --Hudibras.
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            Forged certificates of his . . . moral character.
                                                  --Macaulay.

   Syn: To fabricate; counterfeit; feign; falsify.
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The Collaborative International Dictionary of English v.0.48:

Forge \Forge\ (f[=o]rj), n. [F. forge, fr. L. fabrica the
   workshop of an artisan who works in hard materials, fr. faber
   artisan, smith, as adj., skillful, ingenious; cf. Gr. ? soft,
   tender. Cf. Fabric.]
   1. A place or establishment where iron or other metals are
      wrought by heating and hammering; especially, a furnace,
      or a shop with its furnace, etc., where iron is heated and
      wrought; a smithy.
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            In the quick forge and working house of thought.
                                                  --Shak.
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   2. The works where wrought iron is produced directly from the
      ore, or where iron is rendered malleable by puddling and
      shingling; a shingling mill.
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   3. The act of beating or working iron or steel; the
      manufacture of metallic bodies. [Obs.]
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            In the greater bodies the forge was easy. --Bacon.
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   American forge, a forge for the direct production of
      wrought iron, differing from the old Catalan forge mainly
      in using finely crushed ore and working continuously.
      --Raymond.

   Catalan forge. (Metal.) See under Catalan.

   Forge cinder, the dross or slag form a forge or bloomary.


   Forge rolls, Forge train, the train of rolls by which a
      bloom is converted into puddle bars.

   Forge wagon (Mil.), a wagon fitted up for transporting a
      blackmith's forge and tools.

   Portable forge, a light and compact blacksmith's forge,
      with bellows, etc., that may be moved from place to place.
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The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. i. [See Forge, v. t., and for sense 2, cf.
   Forge compel.]
   1. To commit forgery.
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   2. (Naut.) To move heavily and slowly, as a ship after the
      sails are furled; to work one's way, as one ship in
      outsailing another; -- used especially in the phrase to
      forge ahead. --Totten.
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            And off she [a ship] forged without a shock. --De
                                                  Quincey.
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The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. t. (Naut.)
   To impel forward slowly; as, to forge a ship forward.
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WordNet (r) 3.0 (2006):

forge
    n 1: furnace consisting of a special hearth where metal is
         heated before shaping
    2: a workplace where metal is worked by heating and hammering
       [syn: forge, smithy]
    v 1: create by hammering; "hammer the silver into a bowl";
         "forge a pair of tongues" [syn: forge, hammer]
    2: make a copy of with the intent to deceive; "he faked the
       signature"; "they counterfeited dollar bills"; "She forged a
       Green Card" [syn: forge, fake, counterfeit]
    3: come up with (an idea, plan, explanation, theory, or
       principle) after a mental effort; "excogitate a way to
       measure the speed of light" [syn: invent, contrive,
       devise, excogitate, formulate, forge]
    4: move ahead steadily; "He forged ahead"
    5: move or act with a sudden increase in speed or energy [syn:
       forge, spurt, spirt]
    6: make something, usually for a specific function; "She molded
       the rice balls carefully"; "Form cylinders from the dough";
       "shape a figure"; "Work the metal into a sword" [syn:
       shape, form, work, mold, mould, forge]
    7: make out of components (often in an improvising manner); "She
       fashioned a tent out of a sheet and a few sticks" [syn:
       fashion, forge]