hoar UK /hɔː/US /hoɹ/adjective 4noun 2verb 1forms 3 adjective4 •Of a white or greyish-white colour.old trees with trunks all hoar — 1816 •(literary) Hoarily bearded.And lo, where rapt in beauty's heavenly dream Hoar Plato walks his olived Academe. — 1751 •(no longer used) Figuratively, grey or grey-haired with age; ancient, venerable.Oft list'ning how the hounds and horn Cheerly rouse the slumb'ring morn, From the side of some hoar hill, Through the high wood echoing shrill. — 1645 •(no longer used) Musty; mouldy; stale.But a hare that is hoar Is too much for a score When it hoars ere it be spent. — 1591 noun2 •A white or greyish-white colour. •Hoariness; antiquity.His grants are engrafted on the public law of Europe, covered with the awful hoar of innumerable ages. — 1796 verb1 •(no longer used) To become mouldy or musty.But a hare that is hoar / Is too much for a score / When it hoars ere it be spent. — 1591 formshoared · hoaring · hoars