Armageddon is a final battle of catastrophic destruction. Nuclear Armageddon, face Armageddon, an Armageddon scenario.
It comes from Revelation, where Armageddon is the place the final battle is fought, and it is a place name rather than an event in the original. Since 1945 it has mostly meant nuclear war, and it is used loosely for any total disaster.
1nounarmageddonA final battle of catastrophic destruction.
“The preacher warned that Armageddon was coming and the world would soon end in fire.”
armageddon is a catastrophe.
Greek Harmagedon in Revelation, probably from Hebrew har Megiddo, the hill of Megiddo, a real battlefield.
A generalization of Armageddon.
Etymology from Wiktionary, CC BY-SA