(Or "Multiple Master Font") A font that is a mixture of two or more other fonts.

A Multiple Master font is a single font containing from two to sixteen master designs (the current implementation limit). A weight factor specifies the contribution of each master design for the creation of a multiple master font instance.

A Multiple Master instance is a single interpolation of a multiple master font as created by a user or application.

ATM Glossary.

Useable fonts.