Source : Webster's Revised Unabridged Dictionary (1913)

Concentrate \Con*cen"trate\ (? or ?), v. t. [imp. & p. p.
   {Concentrated}; p. pr. & vb. n. {Concentrating}.] [Pref. con-
   + L. centrum center. Cf. {Concenter}.]
   1. To bring to, or direct toward, a common center; to unite
      more closely; to gather into one body, mass, or force; to
      fix; as, to concentrate rays of light into a focus; to
      concentrate the attention.

            (He) concentrated whole force at his own camp.
                                                  --Motley.

   2. To increase the strength and diminish the bulk of, as of a
      liquid or an ore; to intensify, by getting rid of useless
      material; to condense; as, to concentrate acid by
      evaporation; to concentrate by washing; -- opposed to
      {dilute}.

            Spirit of vinegar concentrated and reduced to its
            greatest strength.                    --Arbuthnot.

   Syn: To combine; to condense; to consolidate.

Source : WordNet®

concentrated
     adj 1: gathered together or made less diffuse; "their concentrated
            efforts"; "his concentrated attention"; "concentrated
            study"; "a narrow thread of concentrated ore" [ant: {distributed}]
     2: of or relating to a solution whose dilution has been reduced
     3: intensely focused; "her concentrated passion held them at
        bay"
     4: being the most concentrated solution possible at a given
        temperature; unable to dissolve still more of a substance;
        "a saturated solution" [syn: {saturated}] [ant: {unsaturated}]