Teiresias/Definition

From Greek mythology, he was a Theban seer, who was a character in the play by Sophocles called Oedipus the King. He was also featured in Antigone, also by Sophocles, and in the Bacchae by Euripides, and had great wisdom to foretell the future, which was important implications concerning the concept of fate in mythology.

Source: Elizabeth Vandiver's Classical Mythology course.