Meaning

noun a building containing dressing rooms for bathers

noun a building containing public baths

originInherited from Middle English bathhous, bathous, from Old English bæþhūs (“bathhouse”), equivalent to bath + house. Cognate with Dutch badhuis (“bathhouse”), German Badehaus (“bathhouse”), German Low German Baadhuus, Boodhuus (“bathhouse”), Danish badehus (“bathhouse”), Norwegian Bokmål badehus (“bathhouse”), Norwegian Nynorsk badehus (“bathhouse”), Swedish badhus (“bathhouse”).

Etymology from Wiktionary, CC BY-SA 3.0