clas·si·cal 
(klăsĭ-kəl)
(klăsĭ-kəl)adj.
1.
a. Of or relating to the ancient Greeks and Romans, especially their art, architecture, and literature.
b. Conforming to the artistic and literary models of ancient Greece and Rome.
c. Versed in the classics: a classical scholar.
2. Music
a. Of or relating to European music during the latter half of the 18th and the early 19th centuries.
b. Of or relating to music in the educated European tradition, such as symphony and opera, as opposed to popular or folk music.
3. Of, relating to, or being a variety of a language that is epitomized by a prestigious body of literature.
4.
a. Standard and traditional: classical methods of navigation.
b. Relating to or being a school of thought or field of study that is established and widely accepted before others: classical economics.
5. Of or relating to physics that can be described without the use of quantum mechanics or relativity.
6. Relating to or consisting of studies in the humanities and general sciences: a classical curriculum.
clas′si·cali·ty (-kălĭ-tē), classi·cal·ness n.
classi·cal·ly adv.