Noun
The state or quality of being catholic; universality.
Liberality of sentiments; catholicism.
Adherence or conformity to the system of doctrine held by all parts of the orthodox Christian church; the doctrine so held; orthodoxy.
Adherence to the doctrines of the church of Rome, or the doctrines themselves.
Source: Webster's dictionaryDue to the influence of the Roman Catholic Church in the west, where the English language itself developed, the words "catholic" and "catholicity" are sometimes used to refer to that church specifically. Source: Internet
"The purpose of the Catholic Writers Guild Seal of Approval is to help Catholic bookstores and venues in their determination of both the Catholicity of a work as well as its being held to a higher standard of editorial quality. Source: Internet
This means that most parishes or congregations, unless they have more than one officially signed antimins and multiple priests, can celebrate only one Eucharist per day, in order to express the catholicity of the church by avoiding "private masses". Source: Internet
To all these churches, the claim to catholicity (universality, oneness with the ancient church) is important for multiple doctrinal reasons that have more bearing internally in each church than in their relation to the others, now separated in faith. Source: Internet