'Signs' in the Bible

Thus saith Jehovah: Learn not the way of the nations, and be not dismayed at the signs of the heavens; for the nations are dismayed at them.

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

And thou broughtest forth thy people Israel out of the land of Egypt by signs, and by wonders, and by a powerful hand, and by a stretched-out arm, and by great terror;