The Collaborative International Dictionary of English v.0.48:

Environs \En*vi"rons\ (?; 277), n. pl. [F.]
   The parts or places which surround another place, or lie in
   its neighborhood; suburbs; as, the environs of a city or
   town. --Chesterfield.
   [1913 Webster]

WordNet (r) 3.0 (2006):

environs
    n 1: the area in which something exists or lives; "the country--
         the flat agricultural surround" [syn: environment,
         environs, surroundings, surround]
    2: an outer adjacent area of any place [syn: environs,
       purlieu]

Moby Thesaurus II by Grady Ward, 1.0:

77 Moby Thesaurus words for "environs":
   airspace, alentours, ambience, ambit, approach, approximation,
   area, belt, borderlands, boundary, bounds, circle, circuit,
   circumambiencies, circumjacencies, circumstances, closeness,
   compass, confines, context, continental shelf, convergence,
   corridor, country, department, district, division, entourage,
   environing circumstances, environment, foreground, fringes,
   gestalt, ground, habitat, heartland, hinterland, immediacy,
   immediate foreground, land, limits, locality, milieu, nearness,
   neighborhood, nighness, offshore rights, outposts, outskirts, part,
   parts, perimeter, periphery, place, precinct, precincts, premises,
   propinquity, proximity, purlieus, quarter, region, salient,
   section, situation, soil, space, suburbs, surroundings, terrain,
   territory, three-mile limit, total environment, twelve-mile limit,
   vicinage, vicinity, zone