halbhh...I thinking you are missing the points in the definition.
Yes, superstition is unsubstantiated belief in supernatural, but you need to understand that word SUPERNATURAL, which is clearly what you have overlooked when you copy-and-paste the definition to “superstition”.
Supernatural is anything to do that isn’t “natural” and that defied the “laws of nature” or the “laws of physics”.
Supernatural may include entities or events, but it can also be both - where you could associate supernatural events to supernatural entities.
But more often than not, it can be also be associating natural events to supernatural being.
For instances, in the Book of Job, there are passages of many natural phenomena (eg rain, snow, lightning, thunder, cloud, moon, sun, stars/constellations, sea tides, etc, that were only given the claim of “God did it”. Not a single event or phenomena was ever given natural explanation. All those passages are just filled with archaic superstitions.
The person who wrote Job, was clearly superstition man, with no understanding of how nature work. To give you an example of the author’s lack of education, look at this passage:
Clearly, the author was well aware of the Greek myth about the hunter Orion and the Pleiades, and with their myth relating to the star constellation Orion and star cluster Pleiades. According to the myth Orion chase 7 sisters who were nymphs, trying to rape them, but the gods helped them escape from their would-be rapist, by turning them into stars.
The thing is, the imagery used to describe the Pleiades with chain and Orion wearing belt, were man-made description of the star constellations, but none of them are real, there are no real chain or belt.
And yet the author stupidity think these pattern of the constellations were real. And the worse the author did, was putting this superstition in God’s mouth, which would make god sounds like uneducated superstitious fool.
But superstitions can also be mortals performing supernatural events, such as turning water into wine, walking on water, stopping storm with few spoken words, healing the sicks by touching people with his hands or through spoken words like “Go and sin no more”, bringing the dead back to life (eg Lazarus), or raising whole bunch of dead saints and prophets from their graves/tombs, etc.
All these miracles of Jesus, would be considered as superstitions, all of them defying the law of nature.