Definition of HRH in US English:

HRH

British
  • Her or His Royal Highness (as a title)

    ‘HRH Prince Philip’

Pronunciation

HRH

/ˈˌāCH ˈˌär ˈāCH//ˈˌeɪtʃ ˈˌɑr ˈeɪtʃ/