ADJECTIVE (2)

1. characterized by attack on established beliefs or institutions;

2. destructive of images used in religious worship; said of religions, such as Islam, in which the representation of living things is prohibited;

The Collaborative International Dictionary of English v.0.48:

Iconoclastic \I*con`o*clas"tic\, a.
   Of or pertaining to the iconoclasts, or to image breaking.
   --Milman. Iconodule

WordNet (r) 3.0 (2006):

iconoclastic
    adj 1: characterized by attack on established beliefs or
           institutions
    2: destructive of images used in religious worship; said of
       religions, such as Islam, in which the representation of
       living things is prohibited