Definition: "WIA" is a term from the Bible that refers to an act of unrighteousness or wickedness; it's not easily explained by human language and is usually found in the book of Revelation, referring to the judgment on sinners after their death. This passage says, "And I heard them saying unto him, Wisa ye not that he is a great sinner? He hath transgressed his duty, and has done what is evil in the eyes of God: And this man, though he be great, is not righteous; for he have done what is wrong in God's sight."