im·plead /im-'plēd/ vt [Anglo-French empleder, from Old French emplaidier, from en- thoroughly + plaidier to plead]: to bring into a lawsuit; specif: to bring (a third party who is or may be liable to the plaintiff or defendant) into a suit compare interplead, intervene, join
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.