What is the meaning of dress down?

verb

14
 
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APAWordNet. (2010). dress down. Retrieved November 17, 2017, from http://smartdefine.org/dress_down/definitions/1271425
ChicagoWordNet. 2010. "dress down" http://smartdefine.org/dress_down/definitions/1271425 (accessed November 17, 2017).
HarvardWordNet 2010, dress down, Smart Define, viewed 17 November, 2017, <http://smartdefine.org/dress_down/definitions/1271425>.
MLAWordNet. "dress down" 23 October 2010. Web. 17 November 2017. <http://smartdefine.org/dress_down/definitions/1271425>