catholic

The Greek compound 'katholikos' was built from 'kata' (according to, concerning) and 'holos' (whole). Aristotle used related forms in the 4th century BCE to mean general propositions as opposed to particular ones. The word meant something like 'according to the whole,' and it carried a tone of comprehensiveness that would prove irresistible to theologians.

Ignatius of Antioch, writing around 107 CE, was the first to apply the word to the Christian community. His letter to the Smyrnaeans reads: 'Where the bishop is, there the community should be, just as where Jesus Christ is, there is the catholic church.' That single sentence gave the word a proper-noun destiny. For the next millennium, 'catholic' and 'Christian' were nearly synonymous.

The great crack came in 1054. The Eastern and Western churches split in what historians call the Great Schism, and each side claimed the word 'catholic' as its own inheritance. After the Protestant Reformation of the 16th century, the Roman church held the capitalized form, while the lowercase adjective survived in English meaning simply 'universal' or 'broad in scope.'

The word entered Middle English through Old French 'catholique' and Anglo-Latin 'catholicus' by the 13th century. Writers like Chaucer used it without ceremony. By the 17th century, the Oxford English Dictionary records both senses side by side: the institutional and the philosophical. That split has never healed.