1. steep downward plunges, especially of aircraft
Usage: aviation
2. sudden sharp declines or drops
Usage: figurative

1. plunges steeply downward, especially of aircraft
Usage: aviation
2. declines or drops suddenly and sharply
Usage: figurative

Examples

• The fighter jet nosedives toward the ground during the air show.
• Stock prices took dramatic nosedives after the announcement.
• The company’s reputation nosedives following the scandal.
• The pilot recovered from several dangerous nosedives.
• His grades nosedive when he stops studying.
• The economy nosedives during the recession.
• The plane’s sudden nosedives terrified the passengers.