These are just the briefest of definitions of Typography terminology. For more detailed descriptions see the individual page for each term.
Alpha Index of All Desktop Publishing Terms
By Jacci Howard Bear, About.com
Definition: A professional type designer is highly skilled and knowledgeable about the anatomy of typefaces as well as type history. Type designers create new typefaces from scratch or based on existing typeface designs. Today, with the ready availability of font editors and type design software, anyone can modify fonts or create new ones and can be considered type designers, although the best typefaces are still generally created by dedicated, professional type designers.