1) Classical language 
Latinitas was spoken as well as written. Moreover, it was the language taught by the schools. Prescriptive rules therefore applied to it, and where a special subject was concerned, such as poetry or rhetoric, additional rules applied as well. Now that the spoken Latinitas has become extinct (in favor of various other registers later in date) the r...
(from the article `Romance languages`) Notable characteristics of Classical LatinLatin of the Classical period had six regularly used cases in the declension of nouns and adjectives (nominative, vocative, genitive, dative, ... [2 related articles]
[n] - the language of educated people in ancient Rome
noun the language of educated people in ancient Rome; `Latin is a language as dead as dead can be. It killed the ancient Romans--and now it`s killing me`
the form of Latin used in classical literature, esp. the literary Latin of the 1st century b.c. and the 1st and 2nd centuries a.d.