'Signs' in the Bible

He performs great signs, even making fire come down out of the sky to the earth in the sight of people.

He deceives my own people who dwell on the earth because of the signs he was granted to do in front of the beast; saying to those who dwell on the earth, that they should make an image to the beast who had the sword wound and lived.

for they are spirits of demons, performing signs; which go forth to the kings of the whole inhabited earth, to gather them together for the war of that great day of God, the Almighty.

The beast was taken, and with him the false prophet who worked the signs in his sight, with which he deceived those who had received the mark of the beast and those who worshiped his image. These two were thrown alive into the lake of fire that burns with sulfur.