Apocalypse (noun)

1. A catastrophic event that brings widespread destruction and disaster.
2. The end of the world or a great catastrophe.

Origin:

From the greek word ἀποκάλυψις (apokalypsis), from ἀπό (apo) meaning "uncovering" + καλύπτω (kalypto) meaning "to cover".

Examples:

1. The nuclear war caused an apocalypse, destroying most of the planet.
2. The word "apocalypse" comes from the Greek word ἀποκάλυψις (apokalypsis), which means "uncovering".
3. Many religious texts contain references to an apocalypse at the end of the world.
4. The apocalypse was caused by a massive asteroid collision with Earth.
5. The apocalypse will be a time when the world will be completely destroyed.