re·join·der / riˈjoindər/ • n. a reply, esp. a sharp or witty one: she would have made some cutting rejoinder but none came to mind. ∎ dated Law a defendant's answer to the plaintiff's reply or replication.
The answer made by a defendant in the second stage ofcommon-law pleadingthat rebuts or denies the assertions made in the plaintiff's replication.
The rejoinder allows a defendant to present a more responsive and specific statement challenging the allegations made against him or her by the plaintiff.