From Longman Dictionary of Contemporary Englishsmartphonesmart‧phone /ˈsmɑːtfəʊn $ ˈsmɑːrtfoʊn/ noun [countable] a mobile phone that is also a small computer and can connect to the InternetFrom Longman Business Dictionarysmartphonesmart‧phone /ˈsmɑːtfəʊnˈsmɑːrtfoʊn/ noun [countable]TELECOMMUNICATIONS a mobile phone that can take photographs, connect to the Internet etc