Other forms: retailed; retails
If you buy a pair of jeans at your neighborhood Chique Boutique, you’re buying retail, but if you go to China and buy a boatload of jeans directly from the manufacturer, you’re buying wholesale, which is the opposite of retail.
If you make your living growing flowers, you may have a retail shop where you sell to people buying flowers for themselves, and you may also have a wholesale business, where you sell flowers to florists and supermarkets who sell your flowers to their customers. As you have probably figured out, the retail shops — the florists and supermarkets — add their own markup to the wholesale price you charge them, so they can make a profit, too.