1.A belief, practice, or rite irrationally maintained by ignorance of the laws of nature or by faith in magic or chance,
2. A fearful or abject state of mind resulting from such ignorance or irrationality.
- The FreeDictionary.com
Unfortunately, more informed sources in the galaxy have observed that superstition on an interplanetary level is harder to define, as it has been noted that, the universe being the enormously diverse thing that it is, most beliefs, practices and rites end up making some sort of sense somewhere, and that anyway, abject fear as a state of mind is pretty darn rational.