I'm puzzled by the following text referring to St. Anthony of Egypt (second reading here), written by St. Athanasius in the 4th century:
Sex autem nondum exáctis ménsibus a paréntum éxitu, cum de more ad Domínicum procéderet,
The page translate it as "Not six months after his parents’ death, as he was on his way to church for his usual visit"
Similarly, we have:
egréssus quamprímum ex Domínico
Corresponding to "Immediately he left the church"
And then we read:
Rursus in Domínicum ingréssus
Which is translated as "The next time he went to church".
So, judging by declensions, there seems to be a word "Dominicus" meaning church. Yet, cannot find reference to this meaning in online Latin dictionaries. The expression is not widely used elsewhere, it seems.
Is this very idiomatic and context-dependent? Or is there in fact such meaning more broadly speaking?