DGFO Views 5 meanings found DGFO is an abbreviation used by German scientific societies studying orthopteran insects, by a Spanish defence agency overseeing fortifications, and in industry to refer to direct‑gas‑fired ovens. Miscellaneous Direct Gas Fired Ovens Direct Gas Fired Oven International Deutschen Gesellschaft für Orthopterologie Deutsche Gesellschaft für Orthopterologie Dirección General de Fortificaciones y Obras