Definition of Dot pitch:
(In photolithography, printing, electronic display, etc.) a measure of the density of dots used in forming an image, and hence the sharpness of that image; especially (in later use) the smallest distance in an electronic display between two subpixels of the same colour.
Measure of the distance between each adjoining pixel on a color computer monitor, expressed in millimeters (mm). Lower the dot pitch the sharper the displayed image; modern color monitors come with a dot pitch of 0.28 mm or lower. Monochrome monitors, by definition, have a dot pitch of 0, and therefore the sharpest image. See also pixel.
Meaning of Dot pitch & Dot pitch Definition