~ is a way of pronouncing British English that is often considered to be the standard accent. Pronunciations in this dictionary are given in ~. ~ is an abbreviation for ‘Received Pronunciation’.
RP
Meaning of RP in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012