The Collaborative International Dictionary of English v.0.48:

Entourage \En`tou`rage"\ ([aum]N`t[=oo]`r[.a]zh"), n. [F.]
   Surroundings; specif., collectively, one's attendants or
   associates.

         The entourage and mode of life of the mikados were not
         such as to make of them able rulers.     --B. H.
                                                  Chamberlain.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

entourage
    n 1: the group following and attending to some important person
         [syn: cortege, retinue, suite, entourage]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "entourage":
   alentours, ambience, ambit, associates, attendance, attendant,
   attendants, body of retainers, borderlands, circle, circuit,
   circumambiencies, circumjacencies, circumstances, cohort, compass,
   context, cortege, court, courtiers, environing circumstances,
   environment, environs, follower, followers, following, gestalt,
   habitat, milieu, neighborhood, outposts, outskirts, parasite,
   perimeter, periphery, precincts, purlieus, retainers, retinue,
   rout, satellite, situation, suburbs, suite, surroundings,
   total environment, train, vicinage, vicinity