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