[ 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.

Nearby words

  1. disassociate,
  2. disassortative mating,
  3. disaster,
  4. disaster area,
  5. disaster capitalism,
  6. disavow,
  7. disavowal,
  8. disband,
  9. disbar,
  10. disbelief

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

Examples from the Web for disastrously

Word Origin and History for disastrously



1580s, "ill-starred," from French désastreux (16c.), from désastre (see disaster) or from Italian desastroso. Meaning "calamitous" is from c.1600. Related: Disastrously.

Online Etymology Dictionary, © 2010 Douglas Harper