The Collaborative International Dictionary of English v.0.48:

dustman \dust"man\ (d[u^]st"m[a^]n), n.; pl. dustmen
   (d[u^]st"m[e^]n).
   One whose employment is to remove dirt and refuse; a garbage
   man. --Gay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dustman
    n 1: someone employed to collect and dispose of refuse [syn:
         garbage man, garbageman, garbage collector, garbage
         carter, garbage hauler, refuse collector, dustman]