Meaning of RPM in English

RPM

/ ˌɑː piː ˈem; NAmE ˌɑːr/ abbreviation

revolutions per minute (a measurement of the speed of an engine or a record when it is playing)

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.