bath‧tub /ˈbɑːθtʌb $ ˈbæθ-/ BrE AmE noun [countable] especially American English a long large container that you fill with water and sit or lie in to wash yourself SYN bath British English
bath·tub /ˈbæɵˌtʌb, Brit ˈbɑːɵˌtʌb/ noun, pl-tubs[count]chiefly US : a large and long container in which people take baths or showers - called also (chiefly Brit) bath, (US) tub;