(uncountable, physics, chemistry) The change in state of a substance from liquid to solid by cooling to a critically low temperature.
1829, James Macauley, The natural, statistical, and civil history of the state of New YorkHence, there is a succession of thawings and freezings. The former expand, and endeavour to restore the surface of the ground to its natural condition, while the latter contract and harden it.
(countable, medicine) The action of numbing with anesthetics.