1. (a.) White, or grayish white; as, hoar frost; hoar cliffs.

2. (a.) Gray or white with age; hoary.

3. (a.) Musty; moldy; stale.

4. (n.) Hoariness; antiquity.

5. (v. t.) To become moldy or musty.

Jack Frost advanced advanced in life advanced in years aged along in years ancient argent argentine black frost canescent chalky cretaceous elderly fleecy-white frost frost line frost smoke frosted frosty gray gray with age gray-haired gray-headed grizzled grizzly grown old hoarfrost hoary killing frost lactescent lily-white marble marmoreal milky niveous old old as Methuselah patriarchal platinum pure white rime rime frost senectuous sharp frost silver silvered silvery snow-white snowy swan-white venerable white white as snow white frost white with age white-bearded white-crowned white-haired wrinkled wrinkly years old