Longman Dictionary of Contemporary English - miracle

~ n 1 something lucky that you did not expect to happen or did not think was possible  (By some miracle, we managed to catch the plane. | it is a miracle (that))  (It's a miracle you weren't killed!) 2 an action or event that is impossible according to the ordinary laws of nature, believed to be done by God  (the miracles of Jesus) 3 miracle cure/drug a very effective medical treatment that cures even serious diseases 4 work/perform miracles to have a very good effect or result  (Maybe you should try yoga - it worked miracles for me.) 5 a miracle of engineering/design etc something that is produced or invented that is a very impressive example of a particular quality or skill  (This new electronic notebook is a miracle of miniaturization.)