\Seign"ior*y\, n.; pl. {-ies}. [OE. seignorie, OF. seigneurie, F. seigneurie; cf. It. signoria.] 1. The power or authority of a lord; dominion. O'Neal never had any seigniory over that country but what by encroachment he got upon the English. --Spenser. 2. The territory over which a lord holds jurisdiction; a manor. [Written also {seigneury}, and {seignory}.]