definition of
[plunge]

[1] #1 plunge v. [immerse] thrust or throw into; "Immerse yourself in hot water". wn

[2] #2 plunge v. [dive, plunk] drop steeply; "the stock market plunged". wn

[3] #3 plunge v. dash violently or with great speed or impetuosity; "She plunged at it eagerly". wn

[4] #4 plunge v. [launch] begin with vigor; "He launched into a long diatribe"; "She plunged into a dangerous adventure". wn

[5] #5 plunge n. [dip] a brief swim in water. wn