v (transitive) To cause frozen things (such as earth, snow, ice) to melt, soften, or dissolve. Specifically by gradual warming.
n The melting of ice, snow, or other congealed matter; the resolution of ice, or the like, into the state of a fluid; liquefaction by heat of anything congealed by frost
n a warmth of weather sufficient to melt that which is congealed. —w:Dryden | Dryden.