'Iconoclastic' definitions:

Definition of 'iconoclastic'

adjective

Characterized by attack on established beliefs or institutions

adjective

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

From: GCIDE

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