In heraldry, the Catherine wheel symbolizes faith, endurance, martyrdom, and steadfast conviction, deriving its meaning from the instrument of torture associated with Saint Catherine of Alexandria, one of the most venerated female saints in Christian tradition. Because of this connection, it often appears in ecclesiastical, civic, and family heraldry to express religious devotion, moral courage, and the ability to remain constant in the face of suffering or persecution. The wheel may also suggest learning and eloquence through Saint Catherine’s reputation as a wise and articulate defender of her faith, which gives the charge a further association with scholarship and intellectual strength.

Catherine wheels appear in the arms of churches, schools, towns, and institutions dedicated to Saint Catherine, and they are especially common in places where she served as patron saint. In heraldic design, the charge is both distinctive and meaningful, combining a simple geometric form with powerful spiritual significance. In heraldry, the Catherine wheel stands as an emblem of conviction tested by adversity, expressing the idea that true honour is often revealed through faith, wisdom, and unwavering endurance.