rejoin (1) Look up rejoin at Dictionary.com
"join again," 1541, from re- "again" + join (q.v.).
rejoin (2) Look up rejoin at Dictionary.com
"to answer," 1447, legal term, from M.Fr. rejoin-, stem of rejoindre "to answer to a legal charge," from O.Fr. re- "back" + joindre "to join" (see join). General (non-legal) meaning first recorded 1637. Rejoinder is 1450, from M.Fr. rejoindre; originally "defendant's answer to the replication."