Source : Webster's Revised Unabridged Dictionary (1913)

Grid \Grid\, n. (Elec.)
   A plate or sheet of lead with perforations, or other
   irregularities of surface, by which the active material of a
   secondary battery or accumulator is supported.

Grid \Grid\, n.
   A grating of thin parallel bars, similar to a gridiron.

Source : WordNet®

grid
     n 1: a system of high tension cables by which electrical power is
          distributed throughout a region [syn: {power system}, {power
          grid}]
     2: a network of horizontal and vertical lines that provide
        coordinates for locating points on an image [syn: {reference
        grid}]
     3: an electrode placed between the cathode and anode of a
        vacuum tube to control the flow of electrons through the
        tube [syn: {control grid}]
     4: a cooking utensil of parallel metal bars; used to grill fish
        or meat [syn: {gridiron}]