clas·sic / ˈklasik/ • adj. judged over a period of time to be of the highest quality and outstanding of its kind: a classic car. ∎  (of a garment or design) of a simple elegant style not greatly subject to changes in fashion. ∎  remarkably and instructively typical: I had the classic symptoms.• n. 1. a work of art of recognized and established value: his books have become classics. ∎  a garment of a simple, elegant, and long-lasting style. ∎  a thing that is memorable and a very good example of its kind: he's hoping that tomorrow's game will be a classic.2. (usu. Classics) a school subject that involves the study of ancient Greek and Latin literature, philosophy, and history. ∎  (usu. the classics) the works of ancient Greek and Latin writers and philosophers. ∎  dated a scholar of ancient Greek and Latin.3. a major sports tournament or competition, as in golf or tennis.

classic of the first rank; of the standard authors of ancient Greece or Rome XVII; sb. (esp. pl.) ancient Gr. or L. writer XVIII. — F. classique or L. classicus, f. classis CLASS; see -IC.
So classical XVI.