The Collaborative International Dictionary of English v.0.48:

Melt \Melt\, v. i.
   1. To be changed from a solid to a liquid state under the
      influence of heat; as, butter and wax melt at moderate
      temperatures.
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   2. To dissolve; as, sugar melts in the mouth.
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   3. Hence: To be softened; to become tender, mild, or gentle;
      also, to be weakened or subdued, as by fear.
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            My soul melteth for heaviness.        --Ps. cxix.
                                                  28.
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            Melting with tenderness and kind compassion. --Shak.
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   4. To lose distinct form or outline; to blend. See fondue.
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            The soft, green, rounded hills, with their flowing
            outlines, overlapping and melting into each other.
                                                  --J. C.
                                                  Shairp.
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   5. To disappear by being dispersed or dissipated; as, the fog
      melts away. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Melt \Melt\ (m[e^]lt), n. (Zool.)
   See 2d Milt.
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The Collaborative International Dictionary of English v.0.48:

Melt \Melt\, v. t. [imp. & p. p. Melted (obs.) p. p. Molten;
   p. pr. & vb. n. Melting.] [AS. meltan; akin to Gr.
   me`ldein, E. malt, and prob. to E. smelt, v. [root]108. Cf.
   Smelt, v., Malt, Milt the spleen.]
   1. To reduce from a solid to a liquid state, as by heat; to
      liquefy; as, to melt wax, tallow, or lead; to melt ice or
      snow.
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   2. Hence: To soften, as by a warming or kindly influence; to
      relax; to render gentle or susceptible to mild influences;
      sometimes, in a bad sense, to take away the firmness of;
      to weaken.
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            Thou would'st have . . . melted down thy youth.
                                                  --Shak.
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            For pity melts the mind to love.      --Dryden.
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   Syn: To liquefy; fuse; thaw; mollify; soften.
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WordNet (r) 3.0 (2006):

melt
    n 1: the process whereby heat changes something from a solid to
         a liquid; "the power failure caused a refrigerator melt
         that was a disaster"; "the thawing of a frozen turkey takes
         several hours" [syn: thaw, melt, thawing, melting]
    v 1: reduce or cause to be reduced from a solid to a liquid
         state, usually by heating; "melt butter"; "melt down gold";
         "The wax melted in the sun" [syn: melt, run, melt
         down]
    2: become or cause to become soft or liquid; "The sun melted the
       ice"; "the ice thawed"; "the ice cream melted"; "The heat
       melted the wax"; "The giant iceberg dissolved over the years
       during the global warming phase"; "dethaw the meat" [syn:
       dissolve, thaw, unfreeze, unthaw, dethaw, melt]
    3: become more relaxed, easygoing, or genial; "With age, he
       mellowed" [syn: mellow, melt, mellow out]
    4: lose its distinct outline or shape; blend gradually;
       "Hundreds of actors were melting into the scene" [syn:
       melt, meld]
    5: become less clearly visible or distinguishable; disappear
       gradually or seemingly; "The scene begins to fade"; "The tree
       trunks are melting into the forest at dusk" [syn: fade,
       melt]
    6: become less intense and fade away gradually; "her resistance
       melted under his charm"; "her hopes evaporated after years of
       waiting for her fiance" [syn: melt, disappear,
       evaporate]

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "melt":
   affect, assuage, bake, be consumed, be gone, blend, broil, cease,
   cease to be, cease to exist, colliquate, come home to, cook, cut,
   decline, decoagulate, decoct, decrease, defrost, deliquesce,
   dematerialize, depart, die, die away, die out, diminish, disappear,
   disarm, dispel, disperse, dissipate, dissolve, do a fade-out,
   dwindle, erode, evanesce, evaporate, exit, fade, fade away,
   fade out, flee, fleet, flit, fluidify, fluidize, flux, fly,
   forbear, forgive, fuse, give quarter, go, go away, go deep,
   go through one, grieve, have mercy upon, have pity, heat, hide,
   hold in solution, infuse, leach, leave no trace, leave the scene,
   let up on, liquefy, liquesce, liquidize, lixiviate, mellow,
   melt away, melt down, melt into, melt like snow, melt the heart,
   merge, mollify, move, pardon, pass, pass away, pass out, penetrate,
   percolate, perish, perspire, pierce, reach, refine, relax, relent,
   render, reprieve, retire from sight, roast, run, sadden, scorch,
   shrink, sink, sink away, smart, smelt, soften, solubilize, solve,
   spare, sting, stir, suffer an eclipse, sweat, swelter,
   take pity on, thaw, thin, touch, touch a chord, unclot, unfreeze,
   vanish, vanish from sight, warm, waste, waste away, wear away