'Plunge bath' definitions:

Definition of 'Plunge bath'

From: GCIDE

Plunge \Plunge\, n.
1. The act of thrusting into or submerging; a dive, leap, rush, or pitch into, or as into, water; as, to take the water with a plunge. [1913 Webster]
2. Hence, a desperate hazard or act; a state of being submerged or overwhelmed with difficulties. [R.] [1913 Webster]
She was brought to that plunge, to conceal her husband's murder or accuse her son. --Sir P. Sidney. [1913 Webster]
And with thou not reach out a friendly arm, To raise me from amidst this plunge of sorrows? --Addison. [1913 Webster]
3. The act of pitching or throwing one's self headlong or violently forward, like an unruly horse. [1913 Webster]
4. Heavy and reckless betting in horse racing; hazardous speculation. [Cant] [1913 Webster]
Plunge bath, an immersion by plunging; also, a large bath in which the bather can wholly immerse himself.
Plunge battery, or plunging battery (Elec.), a voltaic battery so arranged that the plates can be plunged into, or withdrawn from, the exciting liquid at pleasure. [1913 Webster]