The Collaborative International Dictionary of English v.0.48:
Cabman \Cab"man\, n.; pl. Cabmen. The driver of a cab. [1913 Webster]WordNet (r) 3.0 (2006):
cabman n 1: someone who drives a taxi for a living [syn: taxidriver, taximan, cabdriver, cabman, cabby, hack driver, hack-driver, livery driver]