Defreeze is a term used to describe the process of melting or thawing something that has been frozen. It is often used in reference to food, such as when defrosting frozen meat or vegetables. Defreeze is also used to describe the process of restoring power to a computer or other electronic device after it has been shut down due to a power outage. The crossword solutions for the term defreeze are MELT and THAW, both of which are four-letter words.