v. 1 (often foll. by out) pass from a frozen into a liquid or unfrozen state. 2 (usu. prec. by it as subject) (of the weather) become warm enough to melt ice etc. 3 become warm enough to lose numbness etc. 4 become or make genial. 5 (often foil. by out) cause to thaw. n. 1 thawing. 2 warmth of weather that thaws. [Old English]
