The Collaborative International Dictionary of English v.0.48:

Aggravate \Ag"gra*vate\, v. t. [imp. & p. p. Aggravated; p.
   pr. & vb. n. Aggravating.] [L. aggravatus, p. p. of
   aggravare. See Aggrieve.]
   1. To make heavy or heavier; to add to; to increase. [Obs.]
      "To aggravate thy store." --Shak.
      [1913 Webster]

   2. To make worse, or more severe; to render less tolerable or
      less excusable; to make more offensive; to enhance; to
      intensify. "To aggravate my woes." --Pope.
      [1913 Webster]

            To aggravate the horrors of the scene. --Prescott.
      [1913 Webster]

            The defense made by the prisoner's counsel did
            rather aggravate than extenuate his crime.
                                                  --Addison.
      [1913 Webster]

   3. To give coloring to in description; to exaggerate; as, to
      aggravate circumstances. --Paley.
      [1913 Webster]

   4. To exasperate; to provoke; to irritate. [Colloq.]
      [1913 Webster]

            If both were to aggravate her parents, as my brother
            and sister do mine.                   --Richardson
                                                  (Clarissa).
      [1913 Webster]

   Syn: To heighten; intensify; increase; magnify; exaggerate;
        provoke; irritate; exasperate.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

aggravated \aggravated\ adj.
   1. 1 made more severe or intense, especially in law; as,
      aggravated assault.

   Syn: intensified.
        [WordNet 1.5]

   2. 1 incited, especially deliberately, to anger. aggravated
      by passive resistance

   Syn: provoked.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

aggravated
    adj 1: made more severe or intense especially in law;
           "aggravated assault"
    2: incited, especially deliberately, to anger; "aggravated by
       passive resistance"; "the provoked animal attacked the child"
       [syn: aggravated, provoked]