From the Catholic Encyclopedia:
As long as the spirit of proselytism existed in the East the monasteries furnished the Church with all its missionaries. The names of two have been inscribed by Rome in its calendar of annual feasts, namely, St. Cyril and St. Methodius, the Apostles of the Slavs.
You guys, and Pope Francis, need to study a little Church history, e.g. prior to VC II.
The same can be said of other words which have experienced semantic shift between Church usage and common usage.
"Cult" for instance, has an honorable meaning with in Catholicism; in the words in general, however, it means a deeply erroneous, manipulative and fraudulent sectarian movement.
"Propaganda" is used by the Church to mean simply the dissemination of truths of the Faith ("Propaganda Fide"); in common parlance, it means a program of blatant slant and spin, not in service of the Truth.
I could go on. Ebb tide, for the sake of accuracy we must be knowledgeable about variances in meaning, which may seem over-subtle but which is mass communication (across a variety of audiences) can be decisive and significant.
Mine at 103.