In law, the act of annulling or quashing a judgment; the process of voiding or reversing a court decision; also, a cassation court hears cases to review lower court decisions.
From Medieval Latin 'cassatio' (annulment), derived from 'cassare' (to break/annul). The term entered English legal vocabulary through French law ('Cour de Cassation') and became standardized in international legal systems.
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