Daemon @ the Greek form, rendered "devil" in the Authorized Version of the New Testament. Daemons are spoken of as spiritual beings Matthew:8:16Matthew:10:1Matthew:12:43 -45) at enmity with God, and as having a certain power over man James:2:19; Revelation:16:14). They recognize our Lord as the Son of God Matthew:8:20; Luke:4:41). They belong to the number of those angels that "kept not their first estate," "unclean spirits," "fallen angels," the angels of the devil Matthew:25:41; Revelation:12:7-9). They are the "principalities and powers" against which we must "wrestle" Ephesians:6:12).
Daemoniac @ one "possessed with a devil." In the days of our Lord and his apostles, evil spirits, "daemons," were mysteriously permitted by God to exercise an influence both over the souls and bodies of men, inflicting dumbness Matthew:9:32), blindness (12:22), epilepsy Mark:9:17-27), insanity Matthew:8:28; Mark:5:1-5). Daemoniacs are frequently distinguished from those who are afflicted with ordinary bodily maladies Mark:1:32Mark:16:17-18; Luke:6:17-18). The daemons speak in their own persons Matthew:8:29; Mark:1:23-24Mark:5:7). This influence is clearly distinguished from the ordinary power of corruption and of temptation over men. In the daemoniac his personality seems to be destroyed, and his actions, words, and even thoughts to be overborne by the evil spirit (Mark, l.c.; Acts:19:15).