Sur-reply Law and Legal Definition
Sur-reply is an additional reply to a motion filed after the motion has already been fully briefed. For example, a legal document such as a motion is filed by one party (filing party) requesting the court to enter an order. The other party (responding party) responds to the motion. The filing party then replies to the responding party's response. Some courts allow the responding party to file a sur-reply to the filing party's reply to the responding party's response.