Longman Dictionary of Contemporary English
Wiktionary
a. Showing no (or little) expression of emotion; poker-faced.
Usage examples of "stony-faced".
Outside, Nerissa stood beside a stony-faced Lucien, trying to feign happiness for the sake of the newlyweds but looking as though she was ready to start weeping at any moment.
London, stony-faced, went to the monitors, where Goss sat with the earphones around his neck.
Afterward, Rastar, stony-faced as only a Mardukan could be, showed them the battle-stained flag of the Basik's Own.
The usual banquet fare: fruit salad, consomme, protosoy fillet, steam-table peas and carrots, flagons of California Burgundy, lumpy baked Alaska, everything served with maximum clatter and minimum grace by stony-faced members of downtrodden minority groups.
A line of demonstrators ringed Yountz Center, the heart of Yanakov Park, like stony-faced vultures, ignoring the taunts and jibes flung at them by a small crowd of native Harringtons.
At Heklos's office, the lieutenant, stony-faced, told the general what Lanks had said, being careful not to look at the lord regent.