grid
A rectangular array of squares or rectangles of equal size, such as in a crossword puzzle.
Other meanings
A tiling of the plane with regular polygons; a honeycomb.
A system for delivery of electricity, consisting of various substations, transformers and generators, connected by wire.
Where this comes from
This definition is adapted from “grid” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.