A schematic is a diagram, drawing, or sketch that represents the elements of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details that are not relevant to the information the schematic is intended to convey, and may add unrealistic elements that aid comprehension. For example, a subway map intended for riders may represent a subway station with a dot; the dot doesn't resemble the actual station at all but gives the viewer the information he needs without unnessary visual clutter.

a diagram or plan, as flow chart in a science textbook. See also schema.

A diagram which shows, by means of graphic symbols, the electrical connections, components and functions of an electrical system.

A diagram which shows, by means of graphic symbols, the electrical connections and functions of a specific circuit arrangement. Schematic Tools