a sudden event bringing great damage, loss, or destruction
an unfortunate occurrence; a calamity
if you can meet with Triumph and Disaster and treat those two impostors just the same — Kipling
informal a failure
He was a complete disaster as a teacher
disastrous /-strəs/ adj
disastrously adv
[early French desastre from Old Italian disastro, literally ‘unfavourable aspect of a star’, from dis- (from Latin) + astro star, from Latin astrum]