1. [n]  the act of mixing together; "paste made by a mix of flour and water"; "the mixing of sound channels in the recording studio"
2. [n]  an event that combines things in a mixture; "a gradual mixture of cultures"
3. [n]  a commercially prepared mixture of dry ingredients
4. [v]  as of electronic signals; "mixing sounds"
5. [v]  add as an additional element or part; "mix water into the drink"
6. [v]  mix together different elements; "The colors blend well"; "fuse the clutter of detail into a rich narrative"--A. Schlesinger
7. [v]  mix so as to make a random order or arrangement; "shuffle the cards"
8. [v]  to bring or combine together or with something else; "resourcefully he mingled music and dance"
9. [v]  open (a place) to members of all races and ethnic groups; "This school is completely desegregated"

1. \Mix\, v. t. [imp. & p. p. {Mixed}(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. ?, ?, 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.
            Fair persuasions mixed with sugared words. --Shak.
   2. To unite with in company; to join; to associate.
            Ephraim, he hath mixed himself among the people.
                                                  --Hos. vii. 8.
   3. To form by mingling; to produce by the stirring together
      of ingredients; to compound of different parts.
            Hast thou no poison mixed?            --Shak.
            I have chosen an argument mixed of religious and
            civil considerations.                 --Bacon.
   

2. \Mix\, v. i.
   1. To become united into a compound; to be blended
      promiscuously together.
   2. To associate; to mingle.
            He had mixed Again in fancied safety with his kind.
                                                  --Byron.
   

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