Definition of "Classical" :

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

adjective: of or relating to the first significant period of a civilization, culture, area of study, etc.

"Classical Marxism."

adjective: of or pertaining to or characteristic of the ancient Greeks and Romans, especially their art, literature, or culture

"Classical mythology."

adjective: of or relating to music in the European tradition, such as symphonies and operas

"Classical music."

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

adjective: well-known and long-established in form or style

"A classical ballet."

adjective: of or relating to the languages used by ancient standard authors

"Classical Greek."

adjective: of or relating to the study of the literary works of ancient Greece and Rome

"A classical scholar."