letter; missive
Literary or poetic term for a letter, evoking the image of a wild goose carrying a message. Not used in everyday conversation; more common in classical or elegant writing.
After a long time, a letter arrived from my hometown.
Days of eagerly awaiting a letter continued.
From the classical Chinese legend that wild geese carry letters tied to their legs. The expression is used in Japanese literature to refer poetically to a letter or news from afar.