ornery UK /ˈɔːnəɹi/US /ˈɔɹnəɹi/ adjective3 •(informal) Disagreeable, stubborn, and troublesome to deal with; cantankerous.Through Michael sped the thought: 'Could I make her jealous?' And he was shocked at it. A low-down thought—mean and ornery! — 1924 •(US, informal) Troublesome to deal with in a good way; mischievous, prankish, teasing. •(no longer used) Ordinary, commonplace; hence, inferior, plain-looking, unpleasant. formsornerier · orneriest