pos.sessed puh-zest] adjective 1. spurred or moved by a strong feeling, madness, or a supernatural power (often followed by by, of, or with ) 2.self-possessed; poised. The demon hunkered in the burning space which had once cosseted the Earth. It seethed. The good times fired within it and licked its lust to roaring fury. Faces and pain and the Sun and a tilted head. The demon remembered and it seethed. What had once been the Sun burned on, careless."