The Collaborative International Dictionary of English v.0.48:

Offer \Of"fer\, v. t. [imp. & p. p. Offered; p. pr. & vb. n.
   Offering.] [OE. offren, AS. offrian to sacrifice, fr. L.
   offerre; ob (see OB-) + ferre to bear, bring. The English
   word was influenced by F. offrir to offer, of the same
   origin. See 1st Bear.]
   1. To present, as an act of worship; to immolate; to
      sacrifice; to present in prayer or devotion; -- often with
      up.
      [1913 Webster]

            Thou shalt offer every day a bullock for a sin
            offering for atonement.               --Ex. xxix.
                                                  36.
      [1913 Webster]

            A holy priesthood to offer up spiritual sacrifices.
                                                  --1 Pet. ii.
                                                  5.
      [1913 Webster]

   2. To bring to or before; to hold out to; to present for
      acceptance or rejection; as, to offer a present, or a
      bribe; to offer one's self in marriage.
      [1913 Webster]

            I offer thee three things.            --2 Sam. xxiv.
                                                  12.
      [1913 Webster]

   3. To present in words; to proffer; to make a proposal of; to
      suggest; as, to offer an opinion. With the infinitive as
      an objective: To make an offer; to declare one's
      willingness; as, he offered to help me.
      [1913 Webster]

   4. To attempt; to undertake.
      [1913 Webster]

            All that offer to defend him.         --Shak.
      [1913 Webster]

   5. To bid, as a price, reward, or wages; as, to offer a
      guinea for a ring; to offer a salary or reward.
      [1913 Webster]

   6. To put in opposition to; to manifest in an offensive way;
      to threaten; as, to offer violence, attack, etc.
      [1913 Webster]

   Syn: To propose; propound; move; proffer; tender; sacrifice;
        immolate.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Offering \Of"fer*ing\, n.
   1. The act of an offerer; a proffering.
      [1913 Webster]

   2. That which is offered, esp. in divine service; that which
      is presented as an expiation or atonement for sin, or as a
      free gift; a sacrifice; an oblation; as, sin offering.
      [1913 Webster]

            They are polluted offerings more abhorred
            Than spotted livers in the sacrifice. --Shak.
      [1913 Webster]

   3. A sum of money offered, as in church service; as, a
      missionary offering. Specif.: (Ch. of Eng.) Personal
      tithes payable according to custom, either at certain
      seasons as Christmas or Easter, or on certain occasions as
      marriages or christenings.
      [1913 Webster]

            [None] to the offering before her should go.
                                                  --Chaucer.
      [1913 Webster]

   Burnt offering, Drink offering, etc. See under Burnt.
      etc.
      [1913 Webster]

WordNet (r) 3.0 (2006):

offering
    n 1: something offered (as a proposal or bid); "noteworthy new
         offerings for investors included several index funds" [syn:
         offer, offering]
    2: money contributed to a religious organization
    3: the verbal act of offering; "a generous offer of assistance"
       [syn: offer, offering]
    4: the act of contributing to the funds of a church or charity;
       "oblations for aid to the poor" [syn: oblation, offering]

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "offering":
   Christmas present, advance, alms, alms fee, approach, asking price,
   award, benefaction, beneficence, bid, birthday present, box,
   burnt offering, cadeau, charity, collection, contribution, dole,
   donation, donative, drink offering, ex voto offering, fairing,
   feeler, gift, handout, handsel, heave offering, hecatomb,
   holocaust, human sacrifice, immolation, incense, infanticide,
   invitation, libation, mactation, oblation, offer, offertory,
   overture, peace offering, piacular offering, pittance,
   preliminary approach, present, presentation, proffer,
   sacramental offering, sacrifice, scapegoat, self-immolation,
   self-sacrifice, submission, subscription, suttee, sutteeism,
   tentative approach, thank offering, tithe, tribute,
   votive offering, white elephant, whole offering



Easton's 1897 Bible Dictionary:

Offering
   an oblation, dedicated to God. Thus Cain consecrated to God of
   the first-fruits of the earth, and Abel of the firstlings of the
   flock (Gen. 4:3, 4). Under the Levitical system different kinds
   of offerings are specified, and laws laid down as to their
   presentation. These are described under their distinctive names.