Definition of Frederick I in US English:

Frederick I

proper noun

  • (c.1123–90), king of Germany and Holy Roman Emperor 1152–90; known as Frederick Barbarossa (“Redbeard”). He made a sustained effort to subdue Italy and the papacy, but was eventually defeated at the battle of Legnano in 1176.

Pronunciation

Frederick I

/ˌfred(ə)rik T͟Həˈfərst/