Highness

Highness (abbreviation HH, oral address Your Highness) is a formal style used to address (in second person) or refer to (in third person) certain members of a reigning or formerly reigning dynasty. It is typically used with a possessive adjective: "His Highness", "Her Highness" (HH), "Their Highnesses", etc. Although often combined with other adjectives of honour indicating rank, such as "Imperial", "Royal" or "Serene", it may be used alone.

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Highness is, both literally and figuratively, the quality of being lofty or above. It is used as a term to evoke dignity or honour, and to acknowledge the exalted rank of the person so described.