From Longman Dictionary of Contemporary Englishtelemarketingtel‧e‧mar‧ket‧ing /ˌteliˈmɑːkətɪŋ $ -ˈmɑːr-/ noun [uncountable] TCTBBMa way of selling products to people in which you telephone people to see if they want to buy somethingFrom Longman Business Dictionarytelemarketingtel‧e‧mar‧ket‧ing /ˌteliˈmɑːkətɪŋ-ˈmɑːr-/ noun [uncountable]MARKETING the practice of telephoning people in order to sell thingsThe software will be used in growing applications such as telemarketing and customer service. → inbound telemarketing