1. To lose its distinct outline or shape
2. To reduce from a solid to a liquid state, usually by heating; SYN. run, melt down.

1. Material in the molten state; the mass melted at a single operation or the quantity melted during a specified period
2. The action or process of melting or the period during which it occurs; the condition of being melted
3. A sandwich with melted cheese
4. Spleen; especially; spleen of slaughtered animals for use as feed or food