(1) 大灾难(祸，害)(extremely unfortunate event or happening) [C]：a natural/financial/political～自然灾害/巨大的金融损失/政治灾难;an air/airliner～空难/空难;send help to the～area 往灾区派送救援;die in a～死于灾难;meet with/suffer/face a～遭遇/遭受/面对灾难;The fire/earthquake was the worst～ever to hit the town. 那次火灾/地震是该镇从来未遭受过的最大灾难。

(2) 完全失败的人;大失败(person， thing or event that is a complete failure) [C](infml)：As a teacher， he's a～. 当教师，他极不成功。The dress(I made)/performance/party was a～.(我做的)衣服/表演/聚会完全失败了。

(3) 失败(total failure) [U]：Her career is a story of utter～. 她的职业生涯是一次彻底的失败。

→di′sastrous adj 灾难性的;招致灾难(祸)的;di′sastrously adv 灾难性地