icyEnglishOxford New American Dictionaryicy /ˈīsē, ˈaɪsi / ▸ adjective (icier, iciest) covered with or consisting of ice: there were icy patches on the roads. ▪ very cold: an icy wind. ▪ (of a person's tone or manner) very unfriendly; hostile: her voice was icy. – DERIVATIVES icily /ˈīsilē, ˈaɪsɪli/ adverb,iciness /ˈīsēnəs, ˈaɪsinəs / noun