baptism

noun

1. a Christian sacrament signifying spiritual cleansing and rebirth

   noun.act

   Examples

   Most churches baptize infants but some insist on adult baptism.

   Source: WordNet 3.0

2. The act of baptizing; the application of water to a person, as a sacrament or religious ceremony, by which he is initiated into the visible church of Christ. This is performed by immersion, sprinkling, or pouring.

   noun

   Source: webster1913