Source : Webster's Revised Unabridged Dictionary (1913)

Harassment \Har"ass*ment\, n.
   The act of harassing, or state of being harassed; worry;
   annoyance; anxiety.

         Little harassments which I am led to suspect do
         occasionally molest the most fortunate.  --Ld. Lytton.

Source : WordNet®

harassment
     n 1: a feeling of intense annoyance caused by being tormented;
          "so great was his harassment that he wanted to destroy
          his tormentors" [syn: {torment}]
     2: the act of tormenting by continued persistent attacks and
        criticism [syn: {molestation}]