1. A network of horizontal and vertical lines that provide coordinates for locating points on an image; SYN. reference grid.
2. A utensil of parallel metal bars; used to grill fish or meat; SYN. gridiron.
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.

Network by which electricity is generated and distributed over a region or country. It contains many power stations and switching centers and allows, for example, high demand in one area to be met by surplus power generated in another.
The term is also used for any grating system, as in a cattle grid for controlling the movement of livestock across roads, and a conductor in a storage battery or electron gun.

Network of crossing parallel lines. Rectangular grids are used for drawing graphs. Isometric grids are used for drawing representations of solids in two dimensions in which lengths in the drawing match the lengths of the object.

1. Two sets of lines or linear elements at right angles to each other.
2. A spreadsheet is a grid of rows and columns; a graphics screen is a grid of horizontal and vertical lines of pixels.
3. In optical character recognition, a grid is used for measuring or specifying characters. See also Cartesian coordinates.