Definition from Wiktionary, the free dictionary
Etymology 1 
bathing (not generally comparable; )
- Designed for use whilst bathing.
- The Victorians changed in a bathing machine before paddling in the sea.
bathing (plural bathings)
- The act of taking a bath.
- Present participle of bathe.
- Bathing in the sea is considered healthy.
Derived terms 
Etymology 2 
- Present participle of bath.