|Origin:||baptiser, from Late Latin, from Greek baptizein 'to dip, baptize', from baptein 'to dip'|
bap‧tize also baptise British English [transitive]
to perform the ceremony of baptism on someone [↪ christen]
to accept someone as a member of a particular Christian church by a ceremony of baptism:
He was baptized a Roman Catholic.
to give a child a name in a baptism ceremony:
She was baptized Jane.