'Demon' in the Bible

But as these were going out, behold, they brought to him a dumb man possessed by a demon.

And the demon having been cast out, the dumb spake. And the crowds were astonished, saying, It has never been seen thus in Israel.

For John has come neither eating nor drinking, and they say, He has a demon.

Then was brought to him one possessed by a demon, blind and dumb, and he healed him, so that the dumb man spake and saw.

and lo, a Canaanitish woman, coming out from those borders, cried to him saying, Have pity on me, Lord, Son of David; my daughter is miserably possessed by a demon.

And Jesus rebuked him, and the demon went out from him, and the boy was healed from that hour.