In typography and lettering, a sans-serif, sans serif, gothic, or simply sans letterform is one that does not have extending features called "serifs" at the end of strokes. Sans-serif typefaces tend to have less stroke width variation than serif typefaces. They are often used to convey simplicity and modernity or minimalism.

Sans-serif typefaces have become the most prevalent for display of text on computer screens. On lower-resolution digital displays, fine details like serifs may disappear or appear too large. The term comes from the French word sans, meaning "without" and "serif" of uncertain origin, possibly from the Dutch word schreef meaning "line" or pen-stroke. In printed media, they are more commonly used for display use and less for body text.

Before the term "sans-serif" became common in English typography, a number of other terms had been used. One of these outmoded terms for sans-serif was gothic, which is still used in East Asian typography and sometimes seen in typeface names like News Gothic, Highway Gothic, Franklin Gothic or Trade Gothic.

Sans-serif typefaces are sometimes, especially in older documents, used as a device for emphasis, due to their typically blacker type color.