DEMESNE, Eng. law. The name given to that portion of the Iands of a manor which the lord retained in his own hands for the use of himself and family. These lands were called terra dominicales or demesne lands, because they were occupied by the lord, or dominus manerii, and his servants, &c. 2 Bl. Com. 90. Vide Ancient Demesne; Demesne as of fee; and Soil assault demesne.