Definition – What does DPI (Dots Per Inch) mean?
Dots Per Inch (DPI) is a term that is used to measure the resolution of an image both on the screen and in print. As the name suggests, the term measures how many dots fit into the linear inch. Therefore, the higher the dots per inch, the more details can be shown in the image. Since the 600 dpi printer can print 600 dots both horizontally and vertically, it actually prints 360,000 dots per square inch.
Glossary Web explains DPI (Dots Per Inch)
Since most of the monitors have a native resolution of 72 or 96 pixels per inch, they can’t display a 300 dpi image in actual size. When viewed at 100%, the image will look much bigger than the print version because the pixels on the screen take more space than the dots on the paper. Some users prefer the term pixels per inch as a measure of display image sharpness and reserving dots per inch for use with the print medium.