'Demon' in the Bible

The multitude answered, Thou hast a demon: who seeketh to kill thee?

The Jews answered and said unto him, Say we not well that thou art a Samaritan, and hast a demon?

Jesus answered, I have not a demon; but I honor my Father, and ye dishonor me.

The Jews said unto him, Now we know that thou hast a demon. Abraham died, and the prophets; and thou sayest, If a man keep my word, he shall never taste of death.

And many of them said, He hath a demon, and is mad; why hear ye him?

Others said, These are not the sayings of one possessed with a demon. Can a demon open the eyes of the blind?