noun
[ U ] the business of selling products or services directly to customers who order by mail or by telephone instead of going to a shop / store
noun
[ U ] the business of selling products or services directly to customers who order by mail or by telephone instead of going to a shop / store
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005