What does "disastrous" mean?

Disastrous: Attended with suffering or disaster; very unfortunate; calamitous; ill-fated; as, a disastrous day; a disastrous termination of an undertaking. Wherein I spake of most disastrous chances. Shak. -- Dis*as"trous*ly, adv. -- Dis*as"trous*ness, n.

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