What is the meaning of button up?

Refuse to talk or stop talking; fall silent.
- usage: "The children shut up when their father approached"
- synonyms: close up, clam up, dummy up, shut up, belt up, be quiet, keep mum

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APA	WordNet. (2010). button up. Retrieved September 20, 2026, from http://smartdefine.org/button_up/definitions/1262403
Chicago	WordNet. 2010. "button up" http://smartdefine.org/button_up/definitions/1262403 (accessed September 20, 2026).
Harvard	WordNet 2010, button up, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/button_up/definitions/1262403>.
MLA	WordNet. "button up" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/button_up/definitions/1262403>

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