'Expression' in the Bible

but he didn't respect Cain and his offering. Cain was very angry, and the expression on his face fell.

Yahweh said to Cain, "Why are you angry? Why has the expression of your face fallen?

Jacob saw the expression on Laban's face, and, behold, it was not toward him as before.

and said to them, "I see the expression on your father's face, that it is not toward me as before; but the God of my father has been with me.