to pass or change from a frozen to a liquid or semiliquid state; melt.
to be freed from the physical effect of frost or extreme cold (sometimes followed by out): Sit by the fire and thaw out.
(of the weather) to become warm enough to melt ice and snow: It will probably thaw today.
to become less formal, reserved, or aloof: He thawed at their kindness.
to become less hostile or tense: International relations thawed.
verb (used with object)
to cause to change from a frozen to a liquid or semiliquid state; melt.
to free from the physical effect of frost or extreme cold; bring to a more normal temperature, especially to room temperature: I took the steaks out of the freezer and thawed them.
to make less cold, formal, or reserved.
to make less tense or hostile.
noun
the act or process of thawing.
the act or fact of becoming less formal, reserved, or aloof.
a reduction or easing in tension or hostility.
(in winter or in areas where freezing weather is the norm) weather warm enough to melt ice and snow.
a period of such weather: We had a two-week thaw in January.
the thaw,the first day in the year when ice in harbors, rivers, etc., breaks up or loosens enough to begin flowing to the sea, allowing navigation: The Anchorage thaw came on May 18th.
Origin of thaw
First recorded before 1000; (verb) Middle English thawen,Old English thawian; cognate with Dutch dooien,Old Norse theyja; (noun) late Middle English, derivative of the verb