1. Abelief or practice resulting from ignorance, fear of the unknown, trust in magic or chance, or a false conception of causation.
  2. An irrational abject attitude of mind toward the supernatural, nature, or God resulting from superstition.
  3. A notion maintained despite evidence to the contrary.

The emotion of Superstition is found in the Kidney meridian in the Water element.

Definition from Dictionary by Merriam-Webster.