Miraculous, a.
Etymology: [F. miraculeux. See Miracle.]
1. Of the nature of a miracle; performed by supernatural power; effected by the direct agency of almighty power, and not by natural causes.
2. Supernatural; wonderful.
3. Wonder-working. "The miraculous harp." Shak. -- Mi*rac"u*lous*ly, adv. -- Mi*rac"u*lous*ness, n.
Shades of meaning
Fernald has no entry of its own for miraculous; he lists it under supernatural.
Where he writes about it:
Miraculous is more emphatic and specific than supernatural, as referring to the direct personal intervention of divine power. — from supernatural
Some hold that a miracle, as the raising of the dead, is a direct suspension and even violation of natural laws by the fiat of the Creator, and hence is, in the strictest sense, supernatural; others hold that the miracle is simply the calling forth of a power residing in the laws of nature, but not within their ordinary operation, and dependent on a distinct act of God, so that the miraculous might be termed "extranatural," rather than supernatural. — from supernatural