Definition of thaw

• v. i. - To melt, dissolve, or become fluid; to soften; -- said of that which is frozen; as, the ice thaws.
• v. i. - To become so warm as to melt ice and snow; -- said in reference to the weather, and used impersonally.
• v. i. - Fig.: To grow gentle or genial.
• v. t. - To cause (frozen things, as earth, snow, ice) to melt, soften, or dissolve.
• 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; also, a warmth of weather sufficient to melt that which is congealed.