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nosedive

[nohz-dahyv]
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noun Also nose dive.
  1. a plunge of an aircraft with the forward part pointing downward.
  2. a sudden sharp drop or rapid decline: a time when market values were in a nosedive.
verb (used without object), nose·dived or nose·dove, nose·dived, nose·div·ing. Also nose-dive.
  1. to go into a nosedive: a warning that prices might nosedive.

Origin of nosedive

First recorded in 1910–15; nose + dive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for nose dive

nose dive

noun
  1. a sudden plunge with the nose or front pointing downwards, esp of an aircraft
  2. informal a sudden drop or sharp declineprices took a nose dive
verb nose-dive
  1. to perform or cause to perform a nose dive
  2. (intr) informal to drop suddenly
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012