A swimming baths or swimming bath is a building that contains an indoor public swimming pool. The plural swimming baths can be used to refer to one or more than one of these places.
[British]
It had been two years since I had been to the swimming baths.
regional note: in AM, use pool, swimming pool
2. countable noun
A swimming bath is a public swimming pool, especially an indoor one.
[British]regional note: in AM, use pool, swimming pool