Armageddon
Easton, 1897
Occurs only in Revelation 16:16 (R.V., "Har-Magedon"), as symbolically designating the place where the "battle of that great day of God Almighty" (Revelation 16:14) shall be fought. The word properly means the "mount of Megiddo." It is the scene of the final conflict between Christ and Antichrist. The idea of such a scene was suggested by the Old Testament great battle-field, the plain of Esdraelon (q.v.).
Dictionary: M. G. Easton, Illustrated Bible Dictionary (1897, public domain).