noun
universal peace; peaceful world
A yojijukugo describing a state where the whole country or world is at peace and nothing eventful happens. Literary and somewhat rare; used in formal or poetic contexts.
千里同風の世を願う。
I wish for a world of universal peace.
天下泰平 also means 'peaceful world', but is more common and less literary. 千里同風 emphasizes the idea of peace extending everywhere without incident.
From Chinese classical literature, literally 'a thousand miles, same wind', implying that customs and conditions are uniform and peaceful across a vast area. The exact historical derivation is uncertain.