noun
a garment shaped like a jacket with long sleeves that is used to bind the arms tightly against the body as a means of restraining a violent person
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The patient was restrained in a straightjacket to prevent him from harming himself.
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They had to put him in a straightjacket because he wouldn't stop moving around.
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He felt like he was in a straightjacket with all the rules and regulations at work.
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The strict dress code felt like a straightjacket on her personal style.