All 4 Uses

countenance
in
The Birthmark
(Auto-generated)

...he with a smile, though his countenance was uneasy and displeased.
*

countenance = facial expression
He had left his laboratory to the care of an assistant, cleared his fine countenance from the furnace smoke, washed the stain of acids from his fingers, and persuaded a beautiful woman to become his wife.†
One day, very soon after their marriage, Aylmer sat gazing at his wife with a trouble in his countenance that grew stronger until he spoke.†
Some fastidious persons—but they were exclusively of her own sex—affirmed that the bloody hand, as they chose to call it, quite destroyed the effect of Georgiana's beauty, and rendered her countenance even hideous.†

Definitions:

(1) (countenance as in: a pleasant countenance)
facial expression; or face; or composure or manner
(2) (countenance as in: giving countenance)
to tolerate, approve, or show favor or support
(3) (meaning too rare to warrant focus)
More rarely, in addition to facial expression, countenance can refer to one's posture and other visible features.