the world > physical sensation > cleanness and dirtiness > cleaning > washing > washing oneself or body > [noun] > bathing > a bath > plunge-bath (3)
= plunge bath n. at plunge, n. compounds 1.
a deep bath or pool in which a bather can be fully immersed; a bathe in such a bath or pool.
Originally U.S. A plunge bath or plunge pool.