A measure of the resolution of a device. The higher the number, the sharper the type and images.
Measurement which refers to resolution, sharpness, or clarity of a printer, a computer monitor, or other output device. 300 dpi = 12 dots per mm.
Dots per inch or DPI for short is a measurement of resolution of a printed image as determined by the number of dots that fit into one inch. The higher the concentration of dots per inch, the sharper the image will be.