1. A sudden sharp drop or rapid decline
   "the stock took a nosedive" 
2. A steep nose-down descent by an aircraft
   - dive, nose dive

1. Plunge nose first; drop with the nose or front first, of aircraft

Derived forms: nosediving, nosedives, nose dives, nosedived

Type of: decline, descent, diminution, dive, plunge, plunk

Encyclopedia: Nosedive

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