'Signs' in the Bible

Thus saith the LORD, Learn not the way of the heathen, and be not dismayed at the signs of heaven; for the heathen are dismayed at them.

Which hast set signs and wonders in the land of Egypt, even unto this day, and in Israel, and among other men; and hast made thee a name, as at this day;

And hast brought forth thy people Israel out of the land of Egypt with signs, and with wonders, and with a strong hand, and with a stretched out arm, and with great terror;