Born Again - The process by which a person repents of their sins and trusts Jesus of Nazareth as Lord and Savior. Conservative Protestants believe that this is the only way that one can get to heaven. Some of these denominations do not require that a person repent first.

Born again is a term used originally and mainly in Christianity, where it is associated with salvation, conversion and spiritual rebirth. By extension it is applied in other areas, including a transcending personal experience — or the experience of being spiritually reborn as a "new" human being. (wikipedia)

When a person becomes a member of the LDS Church and continues to be faithful. (Christian Defense)