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Royal Highness

noun

(in England)
  1. a title used prior to 1917 and designating a brother, sister, child, grandchild, aunt, or uncle belonging to the male line of the royal family.
  2. a title used since 1917 and designating a child or grandchild of the sovereign.
  3. any person given this title by the Crown.
(in other countries) a person who is a member of a royal family.

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RELATED WORDS

eminence, emperor, highness, king, lord, prince, queen, sire

Origin of Royal Highness

First recorded in 1645–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for royal highness

Royal Highness

noun

a title of honour used in addressing or referring to a member of a royal family
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012