Source : Webster's Revised Unabridged Dictionary (1913)

Collocation \Col`lo*ca"tion\, n. [L. collocatio.]
   The act of placing; the state of being placed with something
   else; disposition in place; arrangement.

         The choice and collocation of words.     --Sir W.
                                                  Jones.

Source : WordNet®

collocation
     n 1: a grouping of words in a sentence
     2: the act of positioning close together (or side by side); "it
        is the result of the juxtaposition of contrasting colors"
        [syn: {juxtaposition}, {apposition}]

Source : Free On-Line Dictionary of Computing

collocation
     
        {co-location}