Lat. The master of the suit; i.e., the person who was really and directly Interested in the suit as a party, as distinguished from his attorney or advocate. But the term is also applied to one who, though not originally a party, has made himself such, by intervention or otherwise, and has assumed entire control and responsibility for one side, and is treated by the court as liable for costs. See In re Stover, 1 Curt 201, Fed. Cas. No. 13,507.