Definition from Wiktionary, the free dictionary
See also: highness
Highness (plural Highnesses)
- The style of a prince, princess or someone of equivalent rank.
- (obsolete) The style of an emperor or king.
- (both senses): The style is typically used with a possessive pronoun: Your Highness, Their Highnesses, et al.
- (obsolete: style of emperor or king): Majesty (current)
form of address