Definition of hoar in English:

hoar

adjective

literary, Archaic
  • Greyish white; grey or grey-haired with age.

    • ‘These depth hoar complexes, as they are called, can usually be counted as annual layers in the top portion of the GISP2 core.’
    • ‘Gertrude does speak of a willow which ‘grows askant the brook / That shows his hoar leaves in the glassy stream.’’
    grey, greying, greyish, silver, silvery, snowy, snowy-white, white, whitish, grizzly, hoary, hoar, salt-and-pepper
    View synonyms

noun

literary, Archaic
  • [mass noun] Hoar frost.

    • ‘Hector noticed spicules of rime adorning the packing-case shelves like fluffy moulds and hoar on his own beard.’
    • ‘There is still some depth hoar on the ground, but fairly consistent, and more importantly, frozen layers above.’
    • ‘Everything - the trees, the ground, Guiromélans's clothes - is covered with a thick coat of hoar.’
    • ‘Summer temperatures are hot in the sheltered valleys, winter temperatures fall well below zero and hoar frosts are common.’
    • ‘Depth hoar develops when a large, vertical temperature gradient causes vapour to sublime, diffuse and crystallize in a layer.’

Origin

Old English hār, of Germanic origin; related to German hehr majestic, noble.

Pronunciation:

hoar

/hɔː/