In the theology of the Latter Day Saint movement, an endowment refers to a gift of "power from on high", typically associated with the ordinances performed in Latter Day Saint temples. The purpose and meaning of the endowment varied during the life of movement founder Joseph Smith. The term has referred to many such gifts of heavenly power, including the confirmation ritual, the institution of the High Priesthood in 1831, events and rituals occurring in the Kirtland Temple in the mid-1830s, and an elaborate ritual performed in the Nauvoo Temple in the 1840s.
The term endowment has the most significance to adherents of the Latter Day Saint branch known as Mormonism, including most prominently the Church of Jesus Christ of Latter-day Saints (LDS Church), which practices a form of the Nauvoo endowment. The Nauvoo endowment ceremony, introduced by Joseph Smith and codified by Mormon leader Brigham Young, consisted of symbolic acts and covenants designed to prepare participants to officiate in priesthood ordinances, and to give them the keywords and tokens they need to pass by angels guarding the way to heaven. In the LDS Church's modern practices, the endowment ceremony directs new participants to take a number of solemn oaths or covenants such as an oath of consecration to the LDS Church. Also in the LDS Church's modern practices, completing the endowment ceremony is a prerequisite to both full-time missionary service and temple marriage. In order to enter a temple and participate in the endowment ceremony, church members must hold a current temple recommend.