WordWeb Online

1. Showing characteristics of age, especially having grey or white hair
   "nodded his hoary head";
   - grey [Brit, Cdn], gray [US], grey-haired [Brit, Cdn], gray-haired [US], grey-headed [Brit, Cdn], gray-headed [US], grizzly, hoar, white-haired
    
2. Ancient
   "hoary jokes";
   - rusty
    
3. (biology) covered with fine whitish hairs or down
   - canescent

Derived forms: hoariest, hoarier

See also: haired, hairy, hirsute, old

Encyclopedia: Hoary