1) immersion, submersion
1a) of calamities and afflictions with which one is quite overwhelmed
1b) of John's baptism, that purification rite by which men on confessing their sins were bound to spiritual reformation, obtained the pardon of their past sins and became qualified for the benefits of the Messiah's kingdom soon to be set up. This was valid Christian baptism, as this was the only baptism the apostles received and it is not recorded anywhere that they were ever rebaptised after Pentecost.
1c) of Christian baptism; a rite of immersion in water as commanded by Christ, by which one after confessing his sins and professing his faith in Christ, having been born again by the Holy Spirit unto a new life, identifies publicly with the fellowship of Christ and the church.