The verb "melt" is used when something cold or hard changes from a solid to a liquid or soft form. We usually use "melt" with things like snow, ice, and ice cream, but there are other situations in which this word can appear:
All of the snow is melting in our front yard.
When ice melts, it turns to water.
Don’t leave the ice cream out of the freezer. If you do, it will melt.
The defroster on your car will help melt the ice off of your back windshield.
Many people like to eat hot, melted cheese on tortilla chips.
Metals like gold and silver melt at very high temperatures.
Her love for him melted his heart.
If the snow hadn’t melted, we would have been able to go skiing. Now we can’t go.