ArmageddonPronunciation: /ˌɑːməˈgɛd(ə)n/Definition of Armageddon noun (in the New Testament) the last battle between good and evil before the Day of Judgement. the place where the Armageddon will be fought. a dramatic and catastrophic conflict, especially one seen as likely to destroy the world or the human race:nuclear ArmageddonOrigin:Greek, from Hebrew har mĕgiddōn 'hill of Megiddo' (Rev. 16:16)Armageddon in other Oxford dictionaries Definition of Armageddon in the US English dictionary