Source : Webster's Revised Unabridged Dictionary (1913)

Charioteer \Char`i*ot*eer"\, n.
   1. One who drives a chariot.

   2. (Astron.) A constellation. See {Auriga}, and {Wagones}.

Source : WordNet®

charioteer
     n 1: the driver of a chariot
     2: a conspicuous constellation in the northern hemisphere;
        between Great Bear and Orion at edge of Milky Way [syn: {Auriga}]