miracle (n.)

mid-12c., "a wondrous work of God," from Old French miracle (11c.) "miracle, story of a miracle, miracle play," from Latin miraculum "object of wonder" (in Church Latin, "marvelous event caused by God"), from mirari "to wonder at, marvel, be astonished," figuratively "to regard, esteem," from mirus "wonderful, astonishing, amazing," earlier *smeiros, from PIE *smei- "to smile, laugh" (source also of Sanskrit smerah "smiling," Greek meidan "to smile," Old Church Slavonic smejo "to laugh;" see smile (v.)). The Latin word is the source of Spanish milagro, Italian miracolo. 

From mid-13c. as "something that excites wonder or astonishment, extraordinary or remarkable feat," without regard to divinity or supernatural power. It replaced Old English wundortacen, wundorweorc. The Greek words rendered as miracle in the English bibles were semeion "sign," teras "wonder," and dynamis "power," which in the Vulgate were translated respectively as signum, prodigium, and virtus.

Miracle-drug is by 1939 (in reference to sulfanilamide). Miracle-worker "a thaumaturge" is from 1560s (Middle English had mircleour, early 15c.). Miracle-play "medieval dramatic representation of the life of Christ or a saint or other sacred subjects" is by 1744 (miraclis pleynge is from c. 1400). The condiment Miracle Whip was introduced 1933 by Kraft Foods; apparently the name was first given to the patented machine that made it.