Synonyms for Classical (same or very similar meaning)
WordNet sense 1 (traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste):
classical music, serious music
WordNet sense 2 (of recognized authority or excellence):
authoritative, definitive
WordNet sense 3 (established or widely recognized as a model of authority or excellence):
standard
WordNet sense 4 (characteristic of the classical artistic and literary traditions):
classic
From the ODE community, based on WordNet
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