The Collaborative International Dictionary of English v.0.48:
Litigator \Lit"i*ga`tor\, n. [L.] One who litigates. [1913 Webster]WordNet (r) 3.0 (2006):
litigator n 1: (law) a party to a lawsuit; someone involved in litigation; "plaintiffs and defendants are both litigants" [syn: litigant, litigator]