In a manner following traditional, established, or widely accepted standards; in the style of classical art, music, or literature.
From 'classical' (from Latin 'classicus' meaning first-class, of the highest rank), plus '-ly'. The word evolved from describing the highest rank to meaning traditional and timeless.
When people say something is 'classic,' they mean it's been tested by time and proven excellent. The word comes from Latin for 'first-class'—originally only elite things earned that label!
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