The Collaborative International Dictionary of English v.0.48:

Oblation \Ob*la"tion\, n. [L. oblatio: cf. F. oblation. See
   Oblate.]
   1. The act of offering, or of making an offering. --Locke.
      [1913 Webster]

   2. Anything offered or presented in worship or sacred
      service; an offering; a sacrifice.
      [1913 Webster]

            A peculiar . . . oblation given to God. --Jer.
                                                  Taylor.
      [1913 Webster]

            A pin was the usual oblation.         --Sir. W.
                                                  Scott.
      [1913 Webster]

   3. A gift or contribution made to a church, as for the
      expenses of the eucharist, or for the support of the
      clergy and the poor.
      [1913 Webster]

WordNet (r) 3.0 (2006):

oblation
    n 1: the act of contributing to the funds of a church or
         charity; "oblations for aid to the poor" [syn: oblation,
         offering]
    2: the act of offering the bread and wine of the Eucharist [syn:
       Oblation, religious offering]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "oblation":
   Christmas present, award, birthday present, box, burnt offering,
   cadeau, collection, drink offering, ex voto offering, fairing,
   gift, handsel, heave offering, hecatomb, holocaust,
   human sacrifice, immolation, incense, infanticide, libation,
   mactation, offering, offertory, peace offering, piacular offering,
   present, presentation, sacramental offering, sacrifice, scapegoat,
   self-immolation, self-sacrifice, suttee, sutteeism, thank offering,
   tribute, votive offering, white elephant, whole offering



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

OBLATION, eccl. law. In a general sense the property which accrues to the
church by any right or title whatever; but, in a more limited sense, it is
that which the priest receives at the altar, at the celebration of the
eucharist. Ayl. Par. 392.