The term baseline can have several meanings depending on the context. It may refer to:

Baseline (compatibility)
Baseline identifies web platform features that work across browsers. Baseline helps you decide when to use a feature by telling you when it is less likely to cause compatibility problems for your site's visitors.
Baseline (typography)
The baseline is a term used in European and West Asian typography meaning an imaginary line upon which the characters of a font rest.

See also