1. a person who attacks cherished beliefs or institutions.
2. a destroyer of images used in religious worship.
▪ a supporter of the 8th- and 9th-century movement in the Byzantine Church which sought to abolish the veneration of icons and other religious images.historical
▪ a Puritan of the 16th or 17th century.historical
Word Originmid 17th century (in iconoclast (sense 2)): via medieval Latin from ecclesiastical Greek eikonoklastēs, from eikōn ‘likeness’ + klan ‘to break’.
Avoidance or destruction of religious, political or cultural icons
Iconoclasm is the social belief in the importance of the destruction of icons and other images or monuments, most frequently for religious or political reasons. Wikipedia