Source : Webster's Revised Unabridged Dictionary (1913)

Want \Want\, v. t. [imp. & p. p. {Wanted}; p. pr. & vb. n.
   {Wanting}.]
   1. To be without; to be destitute of, or deficient in; not to
      have; to lack; as, to want knowledge; to want judgment; to
      want learning; to want food and clothing.

            They that want honesty, want anything. --Beau. & Fl.

            Nor think, though men were none, That heaven would
            want spectators, God want praise.     --Milton.

            The unhappy never want enemies.       --Richardson.

   2. To have occasion for, as useful, proper, or requisite; to
      require; to need; as, in winter we want a fire; in summer
      we want cooling breezes.

   3. To feel need of; to wish or long for; to desire; to crave.
      `` What wants my son?'' --Addison.

            I want to speak to you about something. --A.
                                                  Trollope.

Wanting \Want"ing\, a.
   Absent; lacking; missing; also, deficient; destitute; needy;
   as, one of the twelve is wanting; I shall not be wanting in
   exertion.

Source : WordNet®

wanting
     adj 1: not existing; "innovation has been sadly lacking";
            "character development is missing from the book" [syn:
             {lacking(p)}, {missing}, {nonexistent}, {wanting(a)}]
     2: inadequate in amount or degree; "a deficient education";
        "deficient in common sense"; "lacking in stamina"; "tested
        and found wanting" [syn: {deficient}, {lacking(p)}, {wanting(p)}]