A person who attacks or criticizes cherished beliefs, traditional institutions, or popular ideas; someone who destroys conventional thinking or established practices. It describes a challenger of orthodox views.
From Greek 'eikonoklastes' meaning 'image-breaker,' combining 'eikon' (image) and 'klastes' (breaker). Originally referred to those who destroyed religious icons during Byzantine controversies, later extended to anyone who attacks established beliefs or institutions.
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