ringtone UK /ˈɹɪŋˌtəʊn/US /ˈɹɪŋˌtoʊn/noun 2verb 1forms 3 noun2 •The sound made by a telephone when ringing.voltage generator ringtone for installation in terminal stations of telephone communication systems for carrier wave — 1975 •A customizable tone used to indicate an incoming call on a telephone, especially a mobile phone.I set my favorite song as my ringtone. verb1 •Of a telephone: to play a ringtone.My handheld ringtoned “Happy Days are Here Again.” I withdrew into a quieter corner of Mahogany Bar and stuck a finger in my other ear. — 2015 formsringtoned · ringtoning · ringtones