Meaning of “bath” - Learner’s Dictionary

bath

noun [ C ] uk us /bɑːθ/
CONTAINER UK (US bathtub)

A1 the container that you sit or lie in to wash your body

WASH

A1 the act of washing your body in a bath, or the water in the bath:

[ usually singular ] UK I'll just have a quick bath.
UK She ran herself a bath (= filled a bath with water).

(Definition of “bath noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)