Glossary Term Definition
The number of dots or pixels per unit of linear measurement, determining the fineness of detail in digital output.
Definition
Resolution in digital typography refers to the density of addressable points — dots per inch (dpi) for printers or pixels per inch (ppi) for screens — that determine the fineness with which letterforms can be rendered. Higher resolution permits smoother curves, finer serifs, and more faithful reproduction of the type designer's intentions. Screen resolution historically lagged behind print (72–96 ppi vs. 300–2400 dpi), but high-density displays have narrowed the gap. Resolution directly affects hinting requirements and the legibility of small text sizes.
Source
No access — Robert Bringhurst — p. 344:
A measure of the fineness of a grid used for typographic imaging. In a 1200 dpi imagesetter, for example, the resolution is 1200 dots per inch.