Merriam-Webster Online Dictionary
catastrophe (noun)1.
the final event of the dramatic action especially of a tragedy
2.
a momentous tragic event ranging from extreme misfortune to utter overthrow or ruin
3.
a) a violent and sudden change in a feature of the earth
b) a violent usually destructive natural event (as a supernova)
4.
utter failure - fiasco the party was a catastrophe
