- a swift, steep downward plunge of an airplane, with the nose toward the earth
- any sudden, sharp drop, as in profits
- A very steep dive of an aircraft.
- A sudden, swift drop or plunge: Stock prices took a nosedive.
(third-person singular simple present nosedives, present participle nosediving, simple past and past participle nosedived)
- (intransitive, of aircraft) To dive down in a steep angle.
- (intransitive, economy) To perform a rapid fall in price or value.