(chiefly historical or dated, singular only, by extension) The stylistic principles of Greek Atticism in application to other languages, especially to Latin.
(countable) An expression or idiom characteristic of or peculiar to Attic Greek, especially an elegant and refined, if grammatically irregular, usage.
1611, Thomas James, A Treatiſe of the Corruption of Scripture, Councels, and Fathers, § II.19, page 68: