[1] : The Collaborative International Dictionary of English v.0.48

bailiwick \bail"iwick\, n. bailie, bailiff + wick a village.
   law
   the precincts within which a bailiff has jurisdiction; the
   limits of a bailiff's authority.
   1913 webster

[2] : WordNet (r) 2.0

bailiwick
     n 1: the area over which a bailiff has jurisdiction
     2: a branch of knowledge; "in what discipline is his
        doctorate?"; "teachers should be well trained in their
        subject"; "anthropology is the study of human beings"
        syn: discipline, subject, subject area, subject
        field, field, field of study, study, branch of
        knowledge
see also:
discipline subject subject area subject field field field of study 
study branch of knowledge 

[3] : Moby Thesaurus II by Grady Ward, 1.0

87 moby thesaurus words for "bailiwick":
   kreis, ambit, archbishopric, archdiocese, arena, arrondissement,
   beat, bishopric, border, borderland, borough, bureau, canton,
   champaign, circle, circuit, city, commissariat, commune,
   congressional district, constablery, constablewick, constabulary,
   constituency, county, demesne, departement, department, diocese,
   district, domain, dominion, duchy, electoral district, electorate,
   field, footing, government, hamlet, hemisphere, hundred,
   judicial circuit, jurisdiction, magistracy, march, metropolis,
   metropolitan area, ministry, municipality, neighborhood, oblast,
   office, okrug, orb, orbit, pale, parish, place, precinct,
   principality, province, quarter, realm, region, riding, round,
   secretariat, sheriffalty, sheriffwick, shire, shrievalty, soke,
   sphere, sphere of influence, stake, stamping ground, state,
   terrain, territory, town, township, turf, vantage, village, walk,
   wapentake, ward

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

bailiwick. the district over which a sheriff has jurisdiction; it signifies 
also the same as county, the sheriff's bailiwick extending over the county. 
     2. in england, it signifies generally that liberty which is exempted 
from the sheriff of the county over which the lord of the liberty appoints a 
bailiff. vide wood's inst. 206. 

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