1, that have been handed down from ancient times was considered in a certain model of authentic or something. Such as: classical philosophy.
2, refers to the ancient culture of the man who created a classic. Such as: classical poetry.
3, full of ancient characteristics. Such as: classical woman.
4, that allusion.
Europe's "classic literature" and "classical music" and does not refer to the ancient Europe (Prehistory to AD 476) of literature and music, but from the 16th century to the 19th century as a modern European cultural forms, with structured , pay attention to logic and so on.