The Collaborative International Dictionary of English v.0.48:

Mix \Mix\, v. i.
   1. To become united into a compound; to be blended
      promiscuously together.
      [1913 Webster]

   2. To associate; to mingle; as, Democrats and Republicans
      mixed freely at the party.
      [1913 Webster +PJC]

            He had mixed
            Again in fancied safety with his kind. --Byron.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mix \Mix\ (m[i^]ks), v. t. [imp. & p. p. Mixed (m[i^]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[,c]ra 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]

WordNet (r) 3.0 (2006):

mix
    n 1: a commercially prepared mixture of dry ingredients [syn:
         mix, premix]
    2: an event that combines things in a mixture; "a gradual
       mixture of cultures" [syn: mix, mixture]
    3: 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]
    v 1: mix together different elements; "The colors blend well"
         [syn: blend, flux, mix, conflate, commingle,
         immix, fuse, coalesce, meld, combine, merge]
    2: open (a place) to members of all races and ethnic groups;
       "This school is completely desegregated" [syn: desegregate,
       integrate, mix] [ant: segregate]
    3: combine (electronic signals); "mixing sounds"
    4: add as an additional element or part; "mix water into the
       drink" [syn: mix, mix in]
    5: to bring or combine together or with something else;
       "resourcefully he mingled music and dance" [syn: mix,
       mingle, commix, unify, amalgamate]
    6: mix so as to make a random order or arrangement; "shuffle the
       cards" [syn: shuffle, ruffle, mix]

Moby Thesaurus II by Grady Ward, 1.0:

215 Moby Thesaurus words for "mix":
   add, admix, admixture, all sorts, alloy, amalgam, amalgamate,
   amalgamation, assemblage, assemble, assimilate, associate,
   associate with, assort with, assortment, bemingle, bind, blend,
   blur, blur distinctions, braid, brew, broad spectrum, build,
   build up, chum, chum together, chum with, clique, clique with,
   club together, clutch, coalesce, combine, come together, commingle,
   commix, commixture, complication, compose, compound, comprise,
   concoct, confound, confuse, conglomerate, conglomeration, conjoin,
   connect, consist of, consolidate, consort with, constitute,
   construct, crunch, decoct, disarrange, disarray, disorganize,
   disrupt, disturb, embarrassing position, embarrassment, embody,
   emulsify, encompass, enter into, fabricate, fellowship,
   fine how-do-you-do, fix up, flock together, flux, form, fraternize,
   fuse, fusion, gallimaufry, get up, go into, hang around with,
   hang out with, hash, hell to pay, herd together, hobble,
   hobnob with, hodgepodge, homogenize, hot water, hotchpot,
   hotchpotch, how-do-you-do, imbroglio, immingle, immix, immixture,
   include, incorporate, integrate, interblend, interfuse,
   interfusion, interlace, interlard, intermingle, intermix,
   intermixture, intertwine, interweave, jam, join,
   join in fellowship, jumble, jumble together, keep company with,
   knead, link, lump, lump together, magpie, make, make one, make up,
   mash, medley, melange, meld, melt into one, merge, merge in, mess,
   mess up, mingle, mingle with, mingle-mangle, miscellany, misdeem,
   mishmash, misidentify, mix up, mix with, mixed bag, mixture,
   morass, muddle, muss up, odds and ends, olio, olla podrida,
   omnium-gatherum, organize, overlook distinctions, pal, pal up with,
   pal with, parlous straits, pass, pasticcio, pastiche, patchwork,
   pickle, piece together, pinch, plight, potpourri, predicament,
   pretty pass, pretty pickle, pretty predicament, put together,
   quagmire, quicksand, reembody, roll into one, run in couples,
   run with, salad, salmagundi, sauce, scramble, scrape, shade into,
   shuffle, slough, solidify, sort with, spot, squeeze, stew,
   sticky wicket, stir up, strait, straits, structure, swamp,
   syncretize, syndicate, synthesize, take up with, throw together,
   tie up with, tight spot, tight squeeze, tightrope, toss together,
   tricky spot, tumble, unholy mess, unify, unite, unite in,
   what you will, work, work in



The Free On-line Dictionary of Computing (30 December 2018):

MIX

   Knuth's hypothetical machine, used in The Art of Computer
   Programming v.1, Donald Knuth, A-W 1969.