† empyˈrosisObs.rare—1. [a. Gr. ἐµπύρωσις n. of action f. ἐµπυρό-ειν = ἐµπυρεύειν to set on fire.] A general fire, conflagration. 1677Hale Prim.Orig.Man. 217 The former Opinion that held these Cataclysms and Empyroses universal.1755in Ash.1847in Craig; and in mod. Dicts.