Meaning

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 most highly developed stage of an earlier civilisation and its culture

adjective of recognized authority or excellence

originSee classic § Etymology for history. By surface analysis, class + -ical or classic + -al or class + -ic + -al

Etymology from Wiktionary, CC BY-SA 3.0