'Wonder' in the Bible

In those days hath Hezekiah been sick even unto death, and he prayeth unto Jehovah, and He speaketh to him, and a wonder hath appointed for him;

and so with the ambassadors of the heads of Babylon, those sending unto him to inquire of the wonder that hath been in the land, God hath left him to try him, to know all in his heart,