Source : Webster's Revised Unabridged Dictionary (1913)

Cabman \Cab"man\, n.; pl. {Cabmen}.
   The driver of a cab.

Source : WordNet®

cabman
     n : someone who drives a taxi for a living [syn: {taxidriver}, {taximan},
          {cabdriver}, {cabby}, {hack driver}, {hack-driver}, {livery
         driver}]