a rectangular matrix of dots from which written characters can be formed
Microsoft Computer Dictionary
n. The rectangular grid, or matrix, of tiny “cells” in which dots are displayed or printed in the patterns required to form text characters, circles, squares, and other graphical images. Depending on the frame of reference, the size of a dot matrix varies from a few rows and columns to an invisible grid covering an entire display screen or printed page. See also dot-matrix printer, raster.
