"highness" in the noun sense
1. Highness
Your Highness or His Highness or Her Highness) title used to address a royal person
2. highness, loftiness
the quality of being high or lofty
3. highness
a high degree (of amount or force etc.
"responsible for the highness of the rates"
Source: WordNet® (An amazing lexical database of English)
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