What I mean is that Catholic "baptism" does not meet the basic definition of baptism (much less Christian baptism...i.e., a baptism associated with salvation itself). It is more of a dedication (in fact, Baptist churches often dedicate infants and this is sometimes referred to...by others...as a "dry baptism").
Adult baptism as just a dedication is also not "Christian baptism". Baptism (as used in Scripture) is a part of the conversion experience. Symbolic, yes, but not merely so.
And who has determined what the most basic definition of baptism is, you?
If one is baptized in the name of the Father, the Son, and the Holy Ghost a valid baptism has taken place.
Sorry, but you, or your interpretation of the Scriptures regarding baptism is not the determining factor.