1. A steep nose-down descent by an aircraft
   "The plane went into a nosedive after losing power";
   - dive, nose dive
    
2. A sudden sharp drop or rapid decline
   "the stock took a nosedive"

1. (air travel) plunge nose first; drop with the nose or front first, of aircraft
   "The plane nosedived into the ocean"

Derived forms: nose dives, nosedives, nosediving, nosedived

Type of: decline, descent, diminution, dive, dump, plunge, plunk [informal]

Encyclopedia: Nosedive