To change from a solid to a liquid state, typically as a result of heat. The ice cream began to melt in the hot sun.
To become more gentle or tender in attitude or feeling. Her stern expression began to melt as she listened to the child's story.
To cause something to become more gentle or tender. His kind words melted her anger away.
To heat (a solid) until it becomes liquid. She melted the chocolate in a double boiler.