n.1 a person who attacks cherished beliefs.
2 a person who destroys images used in religious worship, esp. hist. during the 8th-9th c. in the Churches of the East, or as a Puritan of the 16th-17th c.
Derivatives:
iconoclastic adj. iconoclastically adv.
Etymology: med.L iconoclastes f. eccl.Gk eikonoklastes (as ICONO-, klao break)