a sudden steep fall or drop; a situation where something suddenly becomes worse or begins to fail 急劇下降;急轉直下;暴跌 Oil prices took a nosedive in the crisis. 危機期間,石油價格暴跌。 These policies have sent the construction industry into an abrupt nosedive. 這些政策使得建築業的形勢急轉直下。 Her spirits took a sudden nosedive after her husband’s death. 她丈夫死後,她的情緒突然低落。 Stock markets have crashed in the biggest nosedive this century. 股票市場陷入了本世紀最大的暴跌。
the sudden sharp fall of an aircraft towards the ground with its front part pointing down (飛行器的)俯沖 The pilot put the plane into a nosedive. 飛行員將飛機俯沖下來。