DE SON TORT DEMESNE, Of his own wrong, pleading. The name of a replication in an action for a wrong or injury. When the defendant pleads a matter merely in excuse of an injury to the person or reputation of another, the plaintiff may reply de son tort demesne sans tiel cause; that it was the defendant's own wrong without such cause. Vide the articles, De Injuria, and Without, and also 8 Co. 69 a; Bro. h.t.; Com. Dig. Pleader, F 18.