The Collaborative International Dictionary of English v.0.48:

Dragoman \Drag"o*man\, n.; pl. Dragomans. [From F. dragoman,
   or Sp. dragoman, or It. dragomanno; all fr. LGr. ?, Ar.
   tarjum[=a]n, from the same source as E. targum. Cf.
   Drogman, Truchman.]
   An interpreter; -- so called in the Levant and other parts of
   the East.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dragoman
    n 1: an interpreter and guide in the Near East; in the Ottoman
         Empire in the 18th and 19th centuries a translator of
         European languages for the Turkish and Arab authorities and
         most dragomans were Greek (many reached high positions in
         the government)