1.  bathing(n = noun.act) - immersing the body in water or sunshine;
is a kind of diversion, recreation
has particulars: sea bathing, sun bathing
Derived form verb bathe₃

2.  bathing(n = noun.act) washup - the act of washing yourself (or another person);
is a kind of cleaning, cleansing, cleanup, lavation, wash, washing
has particulars: shower, shower bath, bath, sponge bath, steam bath, turkish bath, vapor bath, vapour bath
Derived form verb bathe₁

   Act of taking a bath or baths. [1913 Webster]

bathing beauty, bathing cap, bathing costume, bathing machine, bathing suit, bathing trunks, bathing tub, sea bathing, sun bathing