Source : Webster's Revised Unabridged Dictionary (1913)

Combine \Com*bine"\, v. t. [imp. & p. p. {Combined}; p. pr. &
   vb. n. {Combining}.] [LL. combinare, combinatum; L. com- +
   binus, pl. bini, two and two, double: cf. F. combiner. See
   {Binary}.]
   1. To unite or join; to link closely together; to bring into
      harmonious union; to cause or unite so as to form a
      homogeneous substance, as by chemical union.

            So fitly them in pairs thou hast combined. --Milton.

            Friendship is the cement which really combines
            mankind.                              --Dr. H. More.

            And all combined, save what thou must combine By
            holy marriage.                        --Shak.

            Earthly sounds, though sweet and well combined.
                                                  --Cowper.

   2. To bind; to hold by a moral tie. [Obs.]

            I am combined by a sacred vow.        --Shak.

Source : WordNet®

combining
     n 1: an occurrence that results in things being united [syn: {combine}]
     2: the act of combining things to form a new whole [syn: {combination},
         {compounding}]