AGUILAR, or AGUILAR DE LA FRONTERA, a town of southern Spain, in the province of Cordova. Pop. (1930) Aguilar "of the Frontier" was so named in the middle ages from its position on the border of the Moorish territories. Situated in the south of the fertile Campina de Cordoba, its olives and white wine are celebrated ; the wine is known as Amontillado, from the adjacent town of Montilla.