n.
Pronunciation: di- ' zas-t ə r, - ' sas-
Function: noun
Etymology: Middle French & Old Italian; Middle French desastre, from Old Italian disastro, from dis- (fr. L) + astro star, from Latin astrum ― more at ASTRAL
Date: 1568
1 obsolete : an unfavorable aspect of a planet or star
2 : a sudden calamitous event bringing great damage, loss, or destruction broadly : a sudden or great misfortune or failure <the party was a disaster >