empyrean n. + Add to list empyre·an Archaic SynonymsEtymology Synonyms empyrealfirmamentheavensspheresublimewelkinOriginGRKἐμπύριος→LATempȳreus→ENempyrean From Latin empȳreus, from Ancient Greek ἐμπύριος (empúrios), from ἐν (en, “in”) + πῦρ (pûr, “fire”) (whence English pyre).