Webster's English Dictionary

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thaw

1. thaw \'tho.\ vb [ME thawen, fr. OE thawian; akin to OHG douwen to thaw, 
   Gk Xte-kein to melt, L tabes wasting disease : to cause to thaw  1a: to go 
   from a frozen to a liquid state : MELT  1b: to become free of the effect 
   (as stiffness or numbness) of cold as a r esult of being warmed 2: to be 
   warm enough to melt ice and snow - used with it of the we ather 3: to 
   abandon aloofness, reserve, or hostility : UNBEND  4: to become mobile, 
   active, or susceptible to change 
2. thaw n 1: the action, fact, or process of thawing  2: a warmth of 
   weather sufficient to thaw ice