a sudden steep fall or drop; a situation where something suddenly becomes worse or begins to fail 急剧下降；急转直下；暴跌 Oil prices took a nosedive in the crisis. 危机期间，石油价格暴跌。 🔊🔊 These policies have sent the construction industry into an abrupt nosedive. 这些政策使得建筑业的形势急转直下。 🔊🔊 Her spirits took a sudden nosedive after her husband’s death. 丈夫去世后，她的情绪骤然下降。 Stock markets have crashed in the biggest nosedive this century. 股市在本世纪最大的暴跌中暴跌。
the sudden sharp fall of an aircraft towards the ground with its front part pointing down （飞行器的）俯冲 The pilot put the plane into a nosedive. 飞行员使飞机俯冲。