Lat. In the civil law. Ownership, control, or direction of a suit. <A fiction of law by which the employment of an attorney or proctor (procurator) in a suit was authorized or justified, he being supposed to become, by the appointment of his principal (dominus) or client, the dom inus litis. Heinecc. Elem. lib. 4, tit. 10, §§ 1246, 1247. —