[1] : The Collaborative International Dictionary of English v.0.48

mix \mix\ mi^ks, v. t. imp.  p. p. mixed mi^kst
   less properly mixt; p. pr.  vb. n. mixing. as.
   miscan; akin to ohg. misken, g. mischen, russ. mieshate, w.
   mysgu, gael. measg, l. miscere, mixtum, gr. mi`sgein,
   migny`nai, skr. mi,cra mixed. the english word has been
   influenced by l. miscere, mixtum cf. mixture, and even
   the as. miscan may have been borrowed fr. l. miscere. cf.
   admix, mash to bruise, meddle.
   1. to cause a promiscuous interpenetration of the parts of,
      as of two or more substances with each other, or of one
      substance with others; to unite or blend into one mass or
      compound, as by stirring together; to mingle; to blend;
      as, to mix flour and salt; to mix wines.
      1913 webster

            fair persuasions mixed with sugared words. --shak.
      1913 webster

   2. to unite with in company; to join; to associate.
      1913 webster

            ephraim, he hath mixed himself among the people.
                                                  --hos. vii. 8.
      1913 webster

   3. to form by mingling; to produce by the stirring together
      of ingredients; to compound of different parts.
      1913 webster

            hast thou no poison mixed?            --shak.
      1913 webster

            i have chosen an argument mixed of religious and
            civil considerations.                 --bacon.
      1913 webster

   4. to combine two or more activities within a specified or
      implied time frame; as, to mix studying and partying while
      at college.
      pjc
see also:
mixed mixt mixing mixture admix mash 
meddle 

[2] : WordNet (r) 2.0

mixing
     n : 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
see also:
mix commixture admixture mixture intermixture 

[3] : Moby Thesaurus II by Grady Ward, 1.0

43 moby thesaurus words for "mixing":
   fcc, fm broadcasting, federal communications commission, admixture,
   alloyage, amalgamation, blending, broadcasting, coalescence,
   combination, comminglement, commingling, commixture, composition,
   eclecticism, fade-out, fusion, immixture, integration, interfusion,
   interlaced scanning, interlarding, interlardment, interminglement,
   intermingling, intermixture, merger, mingling, mixture, monitoring,
   pluralism, radiobroadcasting, scanning, shading,
   standard broadcasting, switching, syncretism, telecasting,
   televising, tone control, transmission, vestigial transmission,
   volume control

Mixing >> M Words
Mixing, definition of term: Mixing
mixing_pag1.html