gray-headed gray·hea·ded uncommon adjective 1. showing characteristics of age, especially having gray or white hair “whose beard with age is hoar” Coleridge “nodded his hoary head” Synonymsgraygreygray-hairedgrey-hairedgrey-headedgrizzlyhoarhoarywhite-haired Similarold WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.