Definition of "nosedive" in English

noun

1. A headfirst fall or jump.

2. (aviation) A drop in altitude with the nose of the craft angled downwards.

3. (economics, etc.) A rapid fall, e.g. in price or value.

verb

1. (intransitive, of aircraft) To dive down in a steep angle.

2. (intransitive, economy) To perform a rapid fall in price or value.