a wide, open, deep, typically round container with a flat bottom used for holding liquids, growing plants, etc.

a rainwater tub

a short, broad boat that handles awkwardly

the old tub's in need of a refit

plant in a tub

plant them in drifts at the front of your borders, tub them, fill a window box with them: they go anywhere

tubbed fruit trees

wash or bathe (someone or something) in or as in a tub or bath

even your formal evening gown can be tubbed