• (v. i.) To reply, as a plaintiff to a defendant`s rejoinder.
Sur`re·join' intransitive verb [ Prefix sur + rejoin .] (Law) To reply, as a plaintiff to a defendant's rejoinder. 
surrejoin To reply, as a plaintiff to a defendant's rejoinder. Related 'above, over, beyond the normal, excessive' word units: epi-; hyper-; ultra-, ult-.