Definition of thaw

• the process whereby heat changes something from a solid to a liquid; "the power failure caused a refrigerator melt that was a disaster"; "the thawing of a frozen turkey takes several hours"
• warm weather following a freeze; snow and ice melt; "they welcomed the spring thaw"
• 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"