A form of baptism in which part or all of a person's body is submerged WordNet 3.0 & Open English WordNet

Immersion baptism is a method of baptism that is distinguished from baptism by affusion and by aspersion, sometimes without specifying whether the immersion is total or partial, but very commonly with the indication that the person baptized is immersed in water completely. Wikipedia

A method of baptism where the person baptized is immersed Wikipedia Disambiguation

A type of baptism whereby the subject is immersed in water Wikipedia Disambiguation

Method of baptism Wikidata

The total submerging of a person in water as an act of baptism. Wiktionary