Translation

irrational belief / old wives' tale / myth

Meaning

A belief or practice resulting from ignorance, fear of the unknown, trust in magic or chance, or a false conception of causation.

Examples

• Knocking on wood is a common superstition to prevent bad luck.
  不運を避けるために木を叩くのは一般的な迷信です。
• His grandmother held many old superstitions about the full moon.
  彼の祖母は満月について多くの古い迷信を信じていました。