say it: di-ZA-stur
disaster is a noun meaning "a state of extreme (usually irremediable) ruin and misfortune". It carries 3 recorded senses.
a state of extreme (usually irremediable) ruin and misfortune
“lack of funds has resulted in a catastrophe for our school system”
“his policies were a disaster”
an event resulting in great loss and misfortune
“the whole city was affected by the irremediable calamity”
“the earthquake was a disaster”
an act that has disastrous consequences
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for disaster come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.