The Collaborative International Dictionary of English v.0.48:

Offering \Of"fer*ing\, n.
   1. The act of an offerer; a proffering.
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   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.
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            They are polluted offerings more abhorred
            Than spotted livers in the sacrifice. --Shak.
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   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.
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            [None] to the offering before her should go.
                                                  --Chaucer.
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   Burnt offering, Drink offering, etc. See under Burnt.
      etc.
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The Collaborative International Dictionary of English v.0.48:

Burnt \Burnt\, p. p. & a.
   Consumed with, or as with, fire; scorched or dried, as with
   fire or heat; baked or hardened in the fire or the sun.
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   Burnt ear, a black, powdery fungus which destroys grain.
      See Smut.

   Burnt offering, something offered and burnt on an altar, as
      an atonement for sin; a sacrifice. The offerings of the
      Jews were a clean animal, as an ox, a calf, a goat, or a
      sheep; or some vegetable substance, as bread, or ears of
      wheat or barley. Called also burnt sacrifice. --[2 Sam.
      xxiv. 22.]
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Easton's 1897 Bible Dictionary:

Burnt offering
   Hebrew _olah_; i.e., "ascending," the whole being consumed by
   fire, and regarded as ascending to God while being consumed.
   Part of every offering was burnt in the sacred fire, but this
   was wholly burnt, a "whole burnt offering." It was the most
   frequent form of sacrifice, and apparently the only one
   mentioned in the book of Genesis. Such were the sacrifices
   offered by Abel (Gen. 4:3, 4, here called _minhah_; i.e., "a
   gift"), Noah (Gen. 8:20), Abraham (Gen. 22:2, 7, 8, 13), and by
   the Hebrews in Egypt (Ex. 10:25).

     The law of Moses afterwards prescribed the occasions and the
   manner in which burnt sacrifices were to be offered. There were
   "the continual burnt offering" (Ex. 29:38-42; Lev. 6:9-13), "the
   burnt offering of every sabbath," which was double the daily one
   (Num. 28:9, 10), "the burnt offering of every month" (28:11-15),
   the offerings at the Passover (19-23), at Pentecost (Lev.
   23:16), the feast of Trumpets (23:23-25), and on the day of
   Atonement (Lev. 16).

     On other occasions special sacrifices were offered, as at the
   consecration of Aaron (Ex. 29) and the dedication of the temple
   (1 Kings 8:5, 62-64).

     Free-will burnt offerings were also permitted (Lev. 1:13), and
   were offered at the accession of Solomon to the throne (1 Chr.
   29:21), and at the reformation brought about by Hezekiah (2 Chr.
   29: 31-35).

     These offerings signified the complete dedication of the
   offerers unto God. This is referred to in Rom. 12:1. (See ALTAR
   ¯T0000185, SACRIFICE.)