The Collaborative International Dictionary of English v.0.48:

Habitat \Hab"i*tat\ (h[a^]b"[i^]*t[a^]t), n. [L., it dwells, fr.
   habitare. See Habit, v. t.]
   1. (Biol.) The natural abode, locality or region of an animal
      or plant.
      [1913 Webster]

   2. Place where anything is commonly found.
      [1913 Webster]

            This word has its habitat in Oxfordshire. --Earle.
      [1913 Webster]

WordNet (r) 3.0 (2006):

habitat
    n 1: the type of environment in which an organism or group
         normally lives or occurs; "a marine habitat"; "he felt safe
         on his home grounds" [syn: habitat, home ground]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "habitat":
   abode, alentours, ambience, ambit, bailiwick, borderlands, circle,
   circuit, circumambiencies, circumjacencies, circumstances, compass,
   context, domain, element, entourage, environing circumstances,
   environment, environs, gestalt, haunt, home, locale, locality,
   milieu, native environment, neighborhood, outposts, outskirts,
   perimeter, periphery, precincts, purlieus, range, realm, site,
   situation, stamping ground, suburbs, surroundings, terrain,
   territory, total environment, vicinage, vicinity



The Free On-line Dictionary of Computing (30 December 2018):

Habitat

    The original term for on-line graphical
   virtual communities or worlds.  Created at Lucasfilm in 1985
   by Randy Farmer and Chip Morningstar.

   (http://communities.com/habitat.html).

   (1996-06-12)