a small container made of paper or plastic with a lid, in which food is bought or stored
a tub of ice cream
a margarine tub
an open container that is usually round, used for washing, storing things in etc:
trees growing in tubs
the amount of liquid, food etc that a tub can contain
We ate a tub of ice cream.
a large container in which you sit to wash yourself [= bathtub]:
I had a long soak in the tub.
an old boat that travels slowly
boatBritish English informalTTW
someone who is short and fat