-Should really be called "Standard dialect"
-well established & widely recognized as the most acceptable for the government, business, & mass communication
-sets the quality, which is the matter of cultural identity and national concern
-sustained by official state examination, officials, etc.
-Ex. "standard Chinese" = Mandarin
-BRP- "British received pronunciation" for British English, used by politicians, broadcasters, officials
-American Sign Language (ASL)