The Collaborative International Dictionary of English v.0.48:

Stuff \Stuff\, v. t. [imp. & p. p. Stuffed; p. pr. & vb. n.
   Stuffing.] [OE. stoffen; cf. OF. estoffer, F. ['e]toffer,
   to put stuff in, to stuff, to line, also, OF. estouffer to
   stifle, F. ['e]touffer; both perhaps of Teutonic origin, and
   akin to E. stop. Cf. Stop, v. t., Stuff, n.]
   1. To fill by crowding something into; to cram with
      something; to load to excess; as, to stuff a bedtick.
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            Sometimes this crook drew hazel bought adown,
            And stuffed her apron wide with nuts so brown.
                                                  --Gay.
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            Lest the gods, for sin,
            Should with a swelling dropsy stuff thy skin.
                                                  --Dryden.
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   2. To thrust or crowd; to press; to pack.
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            Put roses into a glass with a narrow mouth, stuffing
            them close together . . . and they retain smell and
            color.                                --Bacon.
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   3. To fill by being pressed or packed into.
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            With inward arms the dire machine they load,
            And iron bowels stuff the dark abode. --Dryden.
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   4. (Cookery) To fill with a seasoning composition of bread,
      meat, condiments, etc.; as, to stuff a turkey.
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   5. To obstruct, as any of the organs; to affect with some
      obstruction in the organs of sense or respiration.
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            I'm stuffed, cousin; I can not smell. --Shak.
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   6. To fill the skin of, for the purpose of preserving as a
      specimen; -- said of birds or other animals.
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   7. To form or fashion by packing with the necessary material.
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            An Eastern king put a judge to death for an
            iniquitous sentence, and ordered his hide to be
            stuffed into a cushion, and placed upon the
            tribunal.                             --Swift.
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   8. To crowd with facts; to cram the mind of; sometimes, to
      crowd or fill with false or idle tales or fancies.
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   9. To put fraudulent votes into (a ballot box). [U. S.]
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The Collaborative International Dictionary of English v.0.48:

Stuffing \Stuff"ing\, n.
   1. That which is used for filling anything; as, the stuffing
      of a saddle or cushion.
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   2. (Cookery) Any seasoning preparation used to stuff meat;
      especially, a composition of bread, condiments, spices,
      etc.; forcemeat; dressing.
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   3. A mixture of oil and tallow used in softening and dressing
      leather.
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   Stuffing box, a device for rendering a joint impervious
      where there is a hole through which a movable cylindrical
      body, as the paston rod of a steam engine, or the plunger
      of a pump, slides back and forth, or in which a shaft
      turns. It usually consists of a box or chamber, made by an
      enlargement of part of the hole, forming a space around
      the rod or shaft for containing packing which is
      compressed and made to fill the space closely by means of
      a sleeve, called the gland, which fits loosely around the
      rod, and is pressed upon the packing by bolts or other
      means.
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WordNet (r) 3.0 (2006):

stuffing
    n 1: a mixture of seasoned ingredients used to stuff meats and
         vegetables [syn: stuffing, dressing]
    2: padding put in mattresses and cushions and upholstered
       furniture

Moby Thesaurus II by Grady Ward, 1.0:

143 Moby Thesaurus words for "stuffing":
   Apician, abdomen, all-devouring, anhydration, anus, appendix,
   blast-freezing, blind gut, bolting, bonus, bottling, bowels, brain,
   brining, bush, bushing, canning, cecum, colon, corning, cramming,
   crapulent, crapulous, curing, decoration, dehydration, desiccation,
   doubling, doublure, dressing, dry-curing, drying, duodenum,
   edacious, embalming, endocardium, entrails, evaporation, extra,
   extra added attraction, extra dash, facing, farce, filigree,
   filler, filling, fillip, flourish, forcemeat, foregut,
   freeze-drying, freezing, frill, fuming, gasket, giblets, gizzard,
   gland, glutting, gluttonizing, gluttonous, gobbling, gorging,
   greedy, gulping, guts, guttling, guzzling, heart, hindgut, hoggish,
   hyperphagic, inlay, inlayer, innards, inner mechanism, insatiable,
   insides, insole, intemperate, interlineation, internals, intestine,
   inwards, irradiation, jejunum, jerking, kidney, kishkes, lagniappe,
   large intestine, liner, lining, liver, liver and lights, lung,
   marination, midgut, mummification, omnivorous, ornament, packing,
   padding, perineum, pickling, piggish, polyphagic, potting, premium,
   pump, pylorus, quick-freezing, rapacious, ravenous, rectum,
   refrigeration, salting, seasoning, small intestine, smoking,
   something extra, spleen, stomach, stopping, superaddition, swinish,
   tampon, tar, taxidermy, ticker, tinning, trimming, tripes, twist,
   vermiform appendix, viscera, vitals, voracious, wadding, wainscot,
   wolfing, works, wrinkle