THE RPO Meaning of THE RPO in English ˌRoyal Philharˌmonic ˈOrchestra, the BrE AmE ( also the ˌRoyal Philharˈmonic, ) abbreviation , the RPO a leading British ↑ orchestra , based in London Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012