This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Accompanied by or causing distress or disaster; calamitous.

adj. Extremely bad; terrible: a disastrous report card.

adj. of the nature of a disaster; calamitous.

adj. foreboding disaster; ill-omened.

adj. Full of unpropitious stellar influences; unpropitious; ill-boding.

adj. Attended with suffering or disaster; very unfortunate; calamitous; ill-fated; ending in utter failure or ruin

Gloomy; dismal; threatening disaster.

Ruinous; unfortunate; calamitous; occasioning great distress or injury: as, the day was disastrous; the battle proved disastrous.

adj. (of events) having extremely unfortunate or dire consequences; bringing ruin

"While any outcome that puts Salmond and his chums into outright control of the parliament is deplored by many Scots, the word "disastrous" to describe Labour's performance is as unfair as it is inaccurate."

unfortunate   

disastrously   

unpropitious    ill-boding    calamitous    ill-fated    unfortunate    sinister    cataclysmic    catastrophic    inausîcuous   

fatal    devastate    recent    unfortunate    Embarrass    decisive    impending    perilous    deplorable    disgraceful