noun
highness
HEYE-nuhs
noun
1
A formal title used to address or refer to a prince, princess, or other member of a royal family.
"The guests bowed as they addressed Her Royal Highness."
2
The state or quality of being high.
"The highness of the cliffs made the climb dangerous."
How to Use Highness
Learner’s notesIn plain EnglishA royal title ("Your Highness"), or, less commonly, the literal quality of being tall or elevated.
Common pairings
Her Royal Highness
His Highness
Word Forms
highnesses plural, Highnesses plural
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Etymology
From Middle English hyghnesse, built from high plus the noun-forming suffix -ness.