See 2d Milt.

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.

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.

To be changed from a solid to a liquid state under the
influence of heat; as, butter and wax melt at moderate temperatures.

To dissolve; as, sugar melts in the mouth.

Hence: To be softened; to become tender, mild, or gentle;
also, to be weakened or subdued, as by fear.

To lose distinct form or outline; to blend.

To disappear by being dispersed or dissipated; as, the fog
melts away.