A symbol, sign, or distinctive feature that distinguishes something as false, counterfeit, or undesirable; the opposite of a identifying mark.
From 'anti-' + 'mark' (from Germanic 'marka'). A rare term from commerce and semiotics describing stigmatizing signs or their counterfeits.
Medieval alchemists and forgers understood 'antimarks'—false guildhall marks on metals signaled fraud, turning the entire system of marks into an arms race between authenticators and fraudsters that established modern trademark law.
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