E corect "catholic" care are sensul primar de universal, deplin. Când e scris cu majusculă, "Catholic" se referă la romano-catolicism.
În ortodoxia românească s-au încetăţenit termenii "sobornicitate" şi "sobornicesc" de provenienţă slavă, însă în studii de teologie se utilizează şi sinonimele latine "catolicitate" şi "catolic".

v. Crezul în limba engleză http://www.goarch.org/chapel/liturgical_texts/creed

alte explicaţii http://oca.org/orthodoxy/the-orthodox-faith/doctrine/the-sym...
The Church is also catholic because of its relation to God, Christ, and the Holy Spirit. The word catholic means full, complete, whole, with nothing lacking. God alone is full and total reality; in God alone is there nothing lacking.

Sometimes the catholicity of the Church is understood in terms of the Church’s universality throughout time and space. While it is true that the Church is universal—for all men at all times and in all places—this universality is not the real meaning of the term “catholic” when it is used to define the Church. The term “catholic” as originally used to define the Church (as early as the first decades of the second century) was a definition of quality rather than quantity. Calling the Church catholic means to define how it is, namely, full and complete, all-embracing, and with nothing lacking.