1) (to cause a substance) to become liquid (liquefy)
2) (to cause ice etc) to become liquid through heating; (of soft food) to dissolve, be softened, easily (melt)
3) (of snow and ice) to begin to melt; (to cause anything frozen) to become liquid or soft again (thaw)
(of snow and ice) to begin to melt; (to cause anything frozen) to become liquid or soft again
unfreeze, warm