Herr
From open-dictionary.com - the free dictionary.
Translation depends on the context, e.g.
Herr Schmidt - Mr Schmidt
Damen und Herren - Ladies and Gentlemen
ja, Herr - yes, sir
der Herr - the Lord
All in all it stands for a male person with then need to be treaten with reputation and respect, over ore equal to the speakers position in a hierarchical system.