† frigorObs.rare. [a. L. frīgor, noun of state from frīgēre to be cold.] Extreme coldness. 1599A. M. tr.Gabelhouer's Bk.Phys. 183/1 Ther will approach on him a vehement frigor, or coulde.1603Owen Pembrokesh. (1891) 121 To avoyde the frigor of the frozen seas.