Prédefin is a commune in the Pas-de-Calais department in the Hauts-de-France region of France. Prédefin is situated 34 miles northwest of A…Prédefin is a commune in the Pas-de-Calais department in the Hauts-de-France region of France. Prédefin is situated 34 miles northwest of Arras, on the D93 road.