Adjective

Definition: showing impressive knowledge about a subject.

I encountered this word while reading Waterfront: A Walk Around Manhattan by Philip Lopate.

I still don’t understand how the word is being used because it says in the text ” If the Brooklyn Bridge began as a magisterial, solitary alpine range…” Is it saying that the Brooklyn Bridge  has an impressive knowledge about itself being a bridge?

Source:http://www.merriam-webster.com/dictionary/magisterial