replyとは何ですか?To give an answer in speech or writing.To respond by an action or gesture.To echo.To return gunfire or an attack: The big guns replied. Law To respond to a defendant's plea.To say or give as an answer: I replied that I was unable to help them. See Synonyms at answer.A response in speech or writing.A response by an action or gesture.Law A plaintiff's formal response in answer to that of a defendant.