The Collaborative International Dictionary of English v.0.48:

Largess \Lar"gess\, Largesse \Lar"gesse\ (l[aum]r*j[e^]s" or
   l[aum]r"j[e^]s), n. [F. largesse, fr. large. See Large, a.]
   1. Liberality; generosity; bounty. [Obs.]
      [1913 Webster]

            Fulfilled of largesse and of all grace. --Chaucer.
      [1913 Webster]

   2. A present; a gift; a bounty bestowed.
      [1913 Webster]

            The heralds finished their proclamation with their
            usual cry of "Largesse, largesse, gallant knights!"
            and gold and silver pieces were showered on them
            from the galleries.                   --Sir W.
                                                  Scott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

largesse
    n 1: a gift or money given (as for service or out of
         benevolence); usually given ostentatiously [syn: largess,
         largesse]
    2: liberality in bestowing gifts; extremely liberal and generous
       of spirit [syn: munificence, largess, largesse,
       magnanimity, openhandedness]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "largesse":
   aid, alms, bonuses, bounty, charity, donations, endowments,
   generosity, gifts, grants, largess, liberality, munificence,
   philanthropy, presents, subsidy, subvention, support