The Collaborative International Dictionary of English v.0.48:

Concession \Con*ces"sion\, n. [L. concessio, fr. concedere: cf.
   F. concession. See Concede.]
   1. The act of conceding or yielding; usually implying a
      demand, claim, or request, and thus distinguished from
      giving, which is voluntary or spontaneous.
      [1913 Webster]

            By mutual concession the business was adjusted.
                                                  --Hallam.
      [1913 Webster]

   2. A thing yielded; an acknowledgment or admission; a boon; a
      grant; esp. a grant by government of a privilege or right
      to do something; as, a concession to build a canal.
      [1913 Webster]

            This is therefore a concession, that he doth . . .
            believe the Scriptures to be sufficiently plain.
                                                  --Sharp.
      [1913 Webster]

            When a lover becomes satisfied by small compliances
            without further pursuits, then expect to find
            popular assemblies content with small concessions.
                                                  --Swift.
      [1913 Webster] Concessionaire

WordNet (r) 3.0 (2006):

concession
    n 1: a contract granting the right to operate a subsidiary
         business; "he got the beer concession at the ball park"
         [syn: concession, grant]
    2: the act of conceding or yielding [syn: concession,
       conceding, yielding]
    3: a point conceded or yielded; "they won all the concessions
       they asked for"

Moby Thesaurus II by Grady Ward, 1.0:

169 Moby Thesaurus words for "concession":
   abatement, abatement of differences, acceptance, accommodation,
   accordance, acknowledgment, adjustment, admission, agio, allowance,
   appease, appreciation, arrangement, assuage, avowal, award,
   awarding, bank discount, bargain, bestowal, bestowment, boutique,
   breakage, brevet, calm, cash discount, cession, chain discount,
   chain store, charge-off, charter, circumscription, co-op,
   communication, composition, compromise, conciliate, conferment,
   conferral, confession, contribution, cooperative, cop-out,
   countinghouse, country store, cut, deal, declaration, deduction,
   deliverance, delivery, department store, depreciation,
   desertion of principle, dime store, diploma, discount,
   discount house, discount store, donation, drawback, emporium,
   endowment, establishment, evasion of responsibility, exception,
   exemption, extenuating circumstances, five-and-ten, franchise,
   furnishment, general store, gifting, give-and-take, giving,
   giving way, grain of salt, grant, granting, hedge, hedging, house,
   impartation, impartment, intervene, investiture, kickback, lean,
   letters patent, liberality, liberty, limitation, magasin,
   mail-order house, market, mart, mediate, mental reservation,
   modification, mollify, mutual concession, offer, owning, owning up,
   patent, penalty, penalty clause, percentage, persuade, placate,
   post, premium, presentation, presentment, prevail, price reduction,
   price-cut, profession, propitiate, provision, qualification, quiet,
   rebate, rebatement, recognition, reduction, refund, reservation,
   restriction, retail store, rite of confession, rollback,
   royal grant, salon, salvage, salvo, setoff, settlement, shop,
   shrift, soothe, special case, special treatment, specialness,
   specification, store, subscription, supermarket, supplying,
   surrender, sweeten, tare, time discount, trade discount,
   trading post, tranquilize, tret, unbosoming, underselling,
   understanding, variety shop, variety store, vouchsafement, waiver,
   warehouse, wareroom, wholesale house, write-off, yielding



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

CONCESSION. A grant. This word is frequently used in this sense when applied
to grants made by the French and Spanish governments in Louisiana.