飛ひ信しんひしんMeanings1nounurgent letter; urgent newsdated termDated term for a letter or message sent with urgency, similar to an express dispatch. Not used in modern everyday conversation.江え戸ど時じ代だいには、飛ひ信しんで急きゅうな知しらせを送おくった。In the Edo period, urgent news was sent by express letter.