Meaning of “melt” - Learner’s Dictionary

melt

verb uk us /melt/
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)