1a : look, expression … a countenance which expressed both good humor and intelligence …— Sir Walter Scott b : mental composure … startled, and also somewhat out of countenance.— Arnold Bennett c : calm expression He managed to keep his countenance through the ordeal. 2 : face, visage especially : the face as an indication of mood, emotion, or character The photograph showed his somber countenance. 3 : bearing or expression that offers approval or sanction : moral support … her countenance of their unsafe amusements …— Jane Austen