Definition of highness in English:

highness

noun

  • 1A title given to a person of royal rank, or used in addressing them.

    ‘I am most grateful, Your Highness’
    • ‘His Royal Highness the Prince of Wales has been installed as an Honorary Freeman of the Company.’
    • ‘Her Royal Highness, Sarah Ferguson, the Duchess of York, was an hour late.’
    • ‘‘Thank you, your Highness,’ Sarah whispered, sitting down again, blushing a deeper red.’
    • ‘‘May I draw your attention, your Highness, to The Times,’ he said gravely.’
    • ‘If I could have got close enough last week I would have thanked him personally, but His Highness was surrounded by photographers.’
    royal highness, highness, serene highness, serenity, magnificence
    View synonyms
  • 2[mass noun] The quality of being high.

    ‘the highness of her cheekbones’
    • ‘Her wide dark brown eyes and her thick coarse hair that she keeps styled in a professional bob accent the highness of her cheekbones.’
    highness, tallness, loftiness, distance upwards, extent upwards, vertical measurement, elevation, stature, altitude, distance above the ground
    View synonyms

Origin

Old English hēanes (see high, -ness).

Pronunciation:

highness

/ˈhʌɪnəs/