Source : Webster's Revised Unabridged Dictionary (1913)

Champertor \Cham"per*tor\, n. [F. champarteur a divider of
   fields or field rent. See {Champerty}.] (Law)
   One guilty of champerty; one who purchases a suit, or the
   right of suing, and carries it on at his own expense, in
   order to obtain a share of the gain.