1.the process whereby heat changes something from a solid to a liquid;
the power failure caused a refrigerator melt that was a disaster
2.warm weather following a freeze; snow and ice melt;
they welcomed the spring thaw
3.a relaxation or slackening of tensions or reserve; becoming less hostile;
the thaw between the United States and Russia has led to increased cooperation in world affairs
1.become or cause to become soft or liquid;
The sun melted the ice