plunge in WordNet English dictionary

1. devote (oneself) fully to
   "He immersed himself into his studies"
   steep  immerse  engulf  plunge  engross  absorb  soak up 
   
2. immerse briefly into a liquid so as to wet, coat, or saturate
   "dip the garment into the cleaning solution"; "dip the brush into the paint"
   dunk  dip  souse  plunge  douse 
   
3. drop steeply
   "the stock market plunged"
   dive  plunge  plunk 
   
4. fall abruptly
   "It plunged to the bottom of the well"
   plunge  dump 
   
5. cause to be immersed
   "The professor plunged his students into the study of the Italian text"
   plunge  immerse 
   
6. thrust or throw into
   "Immerse yourself in hot water"
   immerse  plunge 
   
7. begin with vigor
   "He launched into a long diatribe"; "She plunged into a dangerous adventure"
   plunge  launch 
   
8. dash violently or with great speed or impetuosity
   "She plunged at it eagerly"
   plunge 
   

1. a brief swim in water
   dip  plunge 
   
2. a steep and rapid fall
   plunge