An idealized or imaginary pastoral paradise; a perfect rural setting that exists more in imagination than reality, named after the ancient region of Arcadia.
From Arcadia, with the -y suffix creating a proper noun that has become a common noun for idealized pastoral settings. Often capitalized as Arcady when referring to the literary concept specifically.
Arcady became so famous as a poetic symbol that modern people use it without knowing it comes from an actual ancient Greek region—it's the ultimate example of a real place becoming completely absorbed into literary fantasy.
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