The Collaborative International Dictionary of English v.0.48:

Salon \Sa`lon"\, n. [F. See Saloon.]
   1. An apartment for the reception of company; hence, in the
      plural, fashionable parties; circles of fashionable
      society.
      [1913 Webster]

   2. An apartment for the reception and exhibition of works of
      art; hence, an annual exhibition of paintings, sculptures,
      etc., held in Paris by the Society of French Artists; --
      sometimes called the Old Salon.

   New Salon is a popular name for an annual exhibition of
      paintings, sculptures, etc., held in Paris at the Champs
      de Mars, by the Soci['e]t['e] Nationale des Beaux-Arts
      (National Society of Fine Arts), a body of artists who, in
      1890, seceded from the Soci['e]t['e] des Artistes
      Fran[,c]ais (Society of French Artists).
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

salon
    n 1: gallery where works of art can be displayed
    2: a shop where hairdressers and beauticians work [syn: salon,
       beauty salon, beauty parlor, beauty parlour, beauty
       shop]
    3: elegant sitting room where guests are received

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "salon":
   British Museum, Guggenheim Museum, Hermitage, Louvre,
   Metropolitan Museum, National Gallery, Prado, Rijksmuseum,
   Tate Gallery, Uffizi, Vanity Fair, affair, age group, art gallery,
   at home, band, battalion, beau monde, beautiful people,
   best people, best room, bevy, body, boutique, brigade, bunch,
   cabal, cafe society, carriage trade, cast, chain store, clique,
   co-op, cohort, company, complement, concession, contingent,
   cooperative, corps, coterie, countinghouse, country store, covey,
   cream of society, crew, crowd, curatorship, department store,
   detachment, detail, dime store, discount house, discount store,
   division, drawing room, elite, emporium, establishment, evening,
   faction, fashionable society, five-and-ten, fleet, foreroom,
   front room, gallery, gang, gathering, general store, get-together,
   good society, group, grouping, groupment, haut monde, high life,
   high society, house, in-crowd, in-group, jet set, jeunesse doree,
   junta, levee, living room, magasin, mail-order house, market, mart,
   matinee, mob, monde, movement, museology, museum, out-group,
   outfit, pack, parlor, party, peer group, people of fashion,
   phalanx, picture gallery, pinacotheca, platoon, polite society,
   posse, post, reception, regiment, retail store, reunion,
   right people, saloon, set, shop, sitting room, smart set, sociable,
   social, social affair, social gathering, social register, societe,
   society, soiree, solarium, squad, stable, store, string, suite,
   sun parlor, sunroom, supermarket, team, the Four Hundred,
   trading post, tribe, troop, troupe, upper crust, uppercut,
   variety shop, variety store, wake, warehouse, wareroom,
   wholesale house, wing, world of fashion