Classical

Of or relating to the first class or rank, especially in literature or art.

Of or pertaining to the ancient Greeks and Romans, esp. to Greek or Roman authors of the highest rank, or of the period when their best literature was produced; of or pertaining to places inhabited by the ancient Greeks and Romans, or rendered famous by their deeds.

Conforming to the best authority in literature and art; chaste; pure; refined; as, a classical style.

of or relating to the first significant period of a civilization, culture, area of study, etc.; "classic Chinese pottery"; "classical Marxism"

(physics) relating to or based on concepts that preceded the theories of relativity and quantum mechanics

traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste

of or relating to the languages used by ancient standard authors; "classical Greek"

of or pertaining to or characteristic of the ancient Greeks and Romans, especially their art, literature, or culture; "classical mythology"; "the classical world"