What is the meaning of getting?
Getting is the present participle of 'to get' which means to acquire or to obtain something.
The holy water is blessed by a priest and it is to pour it over the person who is getting baptised forehead this is the meaning of holy water this can be blessed by a Priest, Bishop, Pope. The holy water is clean purified water to welcome the person who is getting baptised to the Christian faith . The meaning is the cleansing from original sin.