Meaning of “melt” - Learner’s Dictionary

melt

verb us uk /melt/
The ice cream will melt if we don't put it in the freezer soon.The snow on the mountain melts in the summer.If the ice melted, sea levels would rise.The metal will melt at very high temperatures.Melt the butter in a saucepan.
BECOME LIQUID [ I, T ]

B2 If something melts, it changes from a solid into a liquid because of heat and if you melt something, you heat it until it becomes liquid:

The sun soon melted the ice on the pond.
The chocolate had melted in my pocket.
melted cheese
EMOTION [ I ]

to start to feel love or sympathy, especially after feeling angry:

When he smiles at me, I just melt.
→ See also butter wouldn't melt in sb's mouth

(Definition of “melt” from the Cambridge Learner’s Dictionary © Cambridge University Press)