Understand pillory was a historical device for physical and social punishment, not used today. Museums may display a pillory to illustrate medieval justice.
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Public Shame
Recognize pillory involved community humiliation, revealing stigma attached to certain crimes. The town square had a pillory where petty thieves were displayed.
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Metaphorical Usage
Realize 'pillory' may be used metaphorically to describe someone being harshly criticized. The actor felt like he was in the pillory after bad reviews.