A grid is a pattern of straight lines that cross each other to form squares or rectangles. Think of a checkerboard, graph paper, or the lines on a city map where streets run north-south and east-west. The grid creates a framework that helps organize space and makes things easier to find or measure.

Cities often use grid systems for their streets. Manhattan's famous grid layout means you can find your way around by counting blocks: “Walk three blocks north and two blocks east.” Without the grid, navigation would be much harder. Ancient Romans used grids when planning their cities, and many modern cities followed their example.

Scientists and mathematicians use grids constantly. In math class, you plot points on a coordinate grid to graph equations. Meteorologists use grids to track weather patterns across regions. Video game designers build virtual worlds on invisible grids that determine where objects can be placed.

The word also refers to networks that distribute electricity. The power grid is the system of power plants, transmission lines, and substations that delivers electricity to homes and businesses across entire regions. When news reports mention “off the grid,” they mean disconnected from public utilities, living independently without standard electricity or water services.

Grids work because they turn complicated spaces into organized, predictable patterns. Whether you're designing a building, planning a garden, or creating a spreadsheet, grids help bring order to chaos.