What does apostolicity mean?
Apostolicity is a noun denoting the quality of being apostolic — that is, of deriving from, or standing in unbroken continuity with, the apostles of the early Christian church. It functions as a formal theological term, most prominently appearing as one of the four traditional marks of the true Church described in the Nicene Creed: unity, holiness, catholicity, and apostolicity. In practice, churches and denominations appeal to apostolicity to establish legitimacy, whether through an unbroken chain of episcopal ordination (as in Roman Catholic, Eastern Orthodox, and Anglican traditions) or through fidelity to apostolic teaching and doctrine (as many Protestant bodies assert). The word is scholarly and elevated in register, encountered mainly in works of theology, ecumenical dialogue, and church history rather than casual conversation. Its connotations are those of authority, authenticity, and historical rootedness, making it a useful term for anyone studying how religious institutions ground their claims to legitimacy.
nounThe quality or state of being apostolic; the condition of deriving from, or being in continuity with, the apostles of the Christian church.
- The quality of being apostolic — of originating from, or maintaining unbroken continuity with, the apostles of the Christian church.
- In Christian theology, one of the four traditional marks (notes) of the true Church, alongside unity, holiness, and catholicity.
"The theologians debated whether the new denomination could truly claim apostolicity through its succession of bishops."
"Critics questioned whether the sect's claim to apostolicity rested on any genuine historical succession."
"In the Nicene Creed, the Church is described as one, holy, catholic, and apostolic — apostolicity being the mark that ties it to the original apostles."
Rarely pluralized; the word is typically treated as an abstract quality and used in the singular.
"Different traditions appeal to different apostolicities when defending their legitimacy."
For centuries, churches have argued over who can prove a direct line back to Jesus's twelve apostles — and 'apostolicity' is the technical term for that claim.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of apostolicity
Apostolicity derives from 'apostolic', which traces back through Latin 'apostolicus' to Greek 'apostolos', meaning 'one sent forth' or 'messenger'. The Greek root itself comes from 'stellein' ('to send'), giving the word its core sense of commissioning and mission. As a distinct English noun, apostolicity emerged in the context of post-Reformation theological debate, when questions of church legitimacy and succession made the concept a matter of formal argument. Cognates include 'apostle', 'apostolic', 'apostolate', and 'apostleship', all sharing the same Greek ancestry.
Related word forms
How apostolicity is actually used
A formal, scholarly term used almost exclusively in ecclesiastical and theological contexts. It carries connotations of authority, legitimacy, and historical continuity within Christianity, and appears chiefly in academic theology, canon law, and ecumenical discussion rather than everyday speech.
Easily confused with apostolicity
Apostasy is the abandonment or renunciation of religious faith, whereas apostolicity is the quality of being connected to or derived from the apostles.