The Collaborative International Dictionary of English v.0.48:

Spokesman \Spokes"man\ (sp[=o]ks"man), n.; pl. Spokesmen
   (-men). [Speak, spoke + man.]
   One who speaks for another.
   [1913 Webster]

         He shall be thy spokesman unto the people. --Ex. iv.
                                                  16.
   [1913 Webster]