[ dih-zas-truh s, -zah-struh s ]
/ dɪˈzæs trəs, -ˈzɑ strəs /


causing great distress or injury; ruinous; very unfortunate; calamitous: The rain and cold proved disastrous to his health.
Archaic. foreboding disaster.

Origin of disastrous

1580–90; < Middle French desastreux, Italian disastroso. See disaster, -ous

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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