Dictionary.com's salient definitions are:
- an effect or extraordinary event in the physical world that surpasses all known human or natural powers and is ascribed to a supernatural cause.
- such an effect or event manifesting or considered as a work of God.
Parting the Red Sea, walking on water, feeding thousands with two loaves of bread, raising the dead. Those things are miracles, surpassing all known human or natural powers. Landing a plane safely on water, while a fantastic achievement, is a human achievement, accomplished by humans, granted, yes, with their God-given skills, but human nonetheless. Chesley Sullenberger and the people responsible for this can (and should) give credit to their God.
But, it's not a miracle.