In ceremonial magic, a magical formula or a word of power is a word that is believed to have specific supernatural effects. They are words whose meaning illustrates principles and degrees of understanding that are often difficult to relay using other forms of speech or writing. It is a concise means to communicate very abstract information through the medium of a word or phrase.

Ceremonial magic encompasses a wide variety of rituals of magic. The works included are characterized by ceremony and numerous requisite accessories to aid the practitioner. It can be seen as an extension of ritual magic, and in most cases synonymous with it. Popularized by the Hermetic Order of the Golden Dawn, it draws on such schools of philosophical and occult thought as Hermetic Qabalah, Enochian magic, Thelema, and the magic of various grimoires. Ceremonial magic is part of Hermeticism and Western esotericism.