<p><strong>Noun</strong></p><ul><li>a grating of crossed bars; gridiron.</li><li>Electricity: a metallic framework employed in a storage cell or battery for conducting the electric current and supporting the active material.</li><li>a system of electrical distribution serving a large area, especially by means of high-tension lines.</li><li>Electronics: an electrode in a vacuum tube, usually consisting of parallel wires, a coil of wire, or a screen, for controlling the flow of electrons between the other electrodes.</li><li>Surveying: a basic system of reference lines for a region, consisting of straight lines intersecting at right angles.</li><li>a network of horizontal and perpendicular lines, uniformly spaced, for locating points on a map, chart, or aerial photograph by means of a system of coordinates.</li><li>Architecture: a rectangular system of coordinates used in locating the principal elements of a plan.</li><li>grillage.</li><li>Football: gridiron (def 1).</li></ul>