The Collaborative International Dictionary of English v.0.48:

Mixture \Mix"ture\, n. [L. mixtura, fr. miscere, mixtum, to mix:
   cf. F. mixture. See Mix.]
   1. The act of mixing, or the state of being mixed; as, made
      by a mixture of ingredients. --Hooker.
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   2. That which results from mixing different ingredients
      together; a compound; as, to drink a mixture of molasses
      and water; -- also, a medley.
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            There is also a mixture of good and evil wisely
            distributed by God, to serve the ends of his
            providence.                           --Atterbury.
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   3. An ingredient entering into a mixed mass; an additional
      ingredient.
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            Cicero doubts whether it were possible for a
            community to exist that had not a prevailing mixture
            of piety in its constitution.         --Addison.
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   4. (Med.) A kind of liquid medicine made up of many
      ingredients; esp., as opposed to solution, a liquid
      preparation in which the solid ingredients are not
      completely dissolved.
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   5. (Physics & Chem.) A mass of two or more ingredients, the
      particles of which are separable, independent, and
      uncompounded with each other, no matter how thoroughly and
      finely commingled; -- contrasted with a compound and
      solution; thus, gunpowder is a mechanical mixture of
      carbon, sulphur, and niter.
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   6. (Mus.) An organ stop, comprising from two to five ranges
      of pipes, used only in combination with the foundation and
      compound stops; -- called also furniture stop. It
      consists of high harmonics, or overtones, of the ground
      tone.
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   Syn: Union; admixture; intermixture; medley.
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WordNet (r) 3.0 (2006):

mixture
    n 1: (chemistry) a substance consisting of two or more
         substances mixed together (not in fixed proportions and not
         with chemical bonding)
    2: any foodstuff made by combining different ingredients; "he
       volunteered to taste her latest concoction"; "he drank a
       mixture of beer and lemonade" [syn: concoction, mixture,
       intermixture]
    3: a collection containing a variety of sorts of things; "a
       great assortment of cars was on display"; "he had a variety
       of disorders"; "a veritable smorgasbord of religions" [syn:
       assortment, mixture, mixed bag, miscellany,
       miscellanea, variety, salmagundi, smorgasbord,
       potpourri, motley]
    4: an event that combines things in a mixture; "a gradual
       mixture of cultures" [syn: mix, mixture]
    5: the act of mixing together; "paste made by a mix of flour and
       water"; "the mixing of sound channels in the recording
       studio" [syn: mix, commixture, admixture, mixture,
       intermixture, mixing]