(noun)
a long sock, for example a medical bandage-like covering used as support for treating disorders in the veins in the legs, or a large sock hung by children on Christmas for Santa to fill with gifts
e.g. He wore stockings to prevent his legs from swelling up. Each child hung a stocking near the fireplace.
(verb)
keeping a supply of a particular type of product and having it for sale, providing a supply of some product;
e.g. The store has started stocking more fresh berries since they are in season now.
(verb)
filling something with a supply of goods or gathering a mass of goods or supplies, often for a particular purpose or occasion;
e.g. I am stocking up my kitchen with the foods I will need to cook for the holidays.