What is a glyph and what do we use it for especially in context of silverlight and xaml?
Glyphs are a low-level depiction of a character to be drawn on-screen. A good article on them is available on MSDN: Introduction to the GlyphRun Object and Glyphs Element.
Posting a link for you read, I think it is better than simply rehashing the information in my answer (it has pictures and links for further reading).
See the following MSDN article for info on Glyphs:
http://msdn.microsoft.com/en-us/library/bb979862(VS.95).aspx
you can also see more examples here:
http://www.wynapse.com/Silverlight/Silverlight_Glyph_Explorer.aspx
来源:https://stackoverflow.com/questions/3956673/what-do-we-use-glyph-for