English Reference
noun

thaw

n.
US /ˈθɔ/ UK /θˈɔː/ thaw UK spelling thawed, thaws

  1. 01 B2 Upper Intermediate

    a period of warmer weather when ice and snow melt.

    a period of weather warm enough to melt ice and snow, or the process of melting itself.

    Simple

    The spring thaw caused the river levels to rise quickly.

    In context

    The sudden thaw led to widespread flooding across the valley as the mountain snowpack melted rapidly.

    snowmeltdefrosting
  2. 02 C1 Advanced AcademicFormal

    a time when two countries or groups become more friendly after a period of tension.

    an improvement in relations between two countries or groups, characterized by a reduction in tension or the relaxation of restrictions.

    Simple

    The meeting marked a major thaw in relations between the two nations.

    In context

    Historians often point to the cultural exchange program as the beginning of the diplomatic thaw between the rival superpowers.

    rapprochementdetente
    estrangement

As the active layer becomes thicker over time, it signals that the ice deeper in the ground is thawing.

Phys.org· 26 Aug 2026

In early summer, there is still ice in the ground as it starts to thaw.

Phys.org· 22 Aug 2026

From Middle English thowen, thawen, from Old English þawian, þāwan (“to thaw”), from Proto-West Germanic þauwjan, from Proto-Germanic þawjaną (“to thaw”), from Proto-Indo-European teh₂- (“to melt”). Cognate with Saterland Frisian daie, dauje (“to thaw”), West Frisian teie (“to thaw”), Dutch dooien (“to thaw”), German Low German deien (“to thaw”), German tauen (“to thaw”), Swedish töa (“to thaw”), Icelandic þeyja (“to thaw”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *teh₂-
Level B2 · Upper Intermediate
Frequency Occasional
Updated