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1. Thrust or throw into
   "plunge yourself in hot water";
   - immerse
    
2. Drop steeply
   "the stock market plunged";
   - dive, plunk
    
3. Dash violently or with great speed or impetuosity
   "She plunged at it eagerly"
    
4. Begin with vigour
   "She plunged into a dangerous adventure";
   - launch
    
5. Cause to be immersed
   "The professor plunged his students into the study of the Italian text";
   - immerse
    
6. Fall abruptly
   "It plunged to the bottom of the well";
   - dump
    
7. Immerse briefly into a liquid so as to wet, coat, or saturate
   "plunge the garment into the cleaning solution";
   - dunk, dip, souse, douse
    
8. Devote (oneself) fully to
   "He plunged himself into his studies";
   - steep, immerse, engulf, engross, absorb, soak up, ingulf [archaic]

1. A brief swim in water
   - dip
    
2. A steep and rapid fall

Derived forms: plunging, plunges, plunged

Type of: begin, center [US], centre [Brit, Cdn], come down, commence, concentrate, dart, dash, descend, drop, fall, flash, focus, get, get down, go down, penetrate, perforate, pore, pore over, rivet, scoot [informal], scud, set about, set out, shoot, sink, start, start out, swim, swimming, whip [informal]

Encyclopedia: Plunge