Other forms: bathtubs
A bathtub is the long basin you fill with warm water and lie in. Taps at one end, and a plug on a chain.
American English says bathtub and British English usually says just the bath, which does double duty for the tub and for the act of washing in it. The word gives its name to a shape of curve used in engineering and to gin distilled illegally in the 1920s. Archimedes is supposed to have solved his problem in one, which is why a good idea in the bath is a small tradition.
1nounbathtubA large container for water in which a person washes.
“He ran a hot bathtub and got in.”
Also accepted in games: bath, tub
From bath + tub.
Etymology from Wiktionary, CC BY-SA