melt 
(mĕlt)
(mĕlt)v. melt·ed, melt·ing, melts
v.intr.
1. To be changed from a solid to a liquid state especially by the application of heat.
2. To dissolve: Sugar melts in water.
3. To disappear or vanish gradually as if by dissolving: The crowd melted away after the rally.
4. To pass or merge imperceptibly into something else: Sea melted into sky along the horizon.
5. To become softened in feeling: Our hearts melted at the child's tears.
6. Obsolete To be overcome or crushed, as by grief, dismay, or fear.
v.tr.
1. To change (a solid) to a liquid state especially by the application of heat.
2. To dissolve: The tide melted our sand castle away.
3. To cause to disappear gradually; disperse.
4. To cause (units) to blend: "Here individuals of all races are melted into a new race of men" (Michel Guillaume Jean de Crèvecoeur).
5. To soften (someone's feelings); make gentle or tender.
n.
Phrasal Verb: 1. A melted solid; a fused mass.
2. The state of being melted.
3.
a. The act or operation of melting.
b. The quantity melted at a single operation or in one period.
4. A usually open sandwich topped with melted cheese: a tuna melt.
melt down
1. To undergo a meltdown. Used of a nuclear reactor.
2. To undergo a failure or collapse.
3. To become very angry or upset.
[Middle English melten, from Old English meltan; see mel-1 in the Appendix of Indo-European roots.]
melt′a·bili·ty n.
melta·ble adj.
melter n.
melting·ly adv.
melty adj.