Literally, a wonder or wonderful thing; but appropriately,

In theology, an event or effect contrary to the established constitution and course of things, or a deviation from the known laws of nature; a supernatural event. Miracles can be wrought only by Almighty power, as when Christ healed lepers, saying, “I will, be thou clean,” or calmed the tempest, “Peace, be still." . They considered not the miracle of the loaves. Mark 6:52. A man approved of God by miracles and signs. Acis 2:22.

Anciently, a spectacle or dramatic representation exhibiting the lives of the saints.

To make wonderful.