Source : Webster's Revised Unabridged Dictionary (1913)

Concatenate \Con*cat"e*nate\ (k[o^]n*k[a^]t"[-e]*n[=a]t), v. t.
   [imp. & p. p. {Concatenated}; p. pr. & vb. n.
   {Concatenating}.] [L. concatenatus, p. p. of concatenare to
   concatenate. See {Catenate}.]
   To link together; to unite in a series or chain, as things
   depending on one another.

         This all things friendly will concatenate. --Dr. H.
                                                  More

Source : WordNet®

concatenate
     v 1: arranged into chained list
     2: add by linking or joining so as to form a chain or series;
        "concatenate terms"; "concatenate characters"

Source : Free On-Line Dictionary of Computing

concatenate
     
        To join together two or more files or lists to form one big
        one.
     
        The {Unix} {cat} command can be used to concatenate files.
     
        (1995-12-22)