What is the meaning of dress down?

verb

14
 
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APAWordNet. (2010). dress down. Retrieved July 20, 2018, from http://smartdefine.org/dress_down/definitions/1271425
ChicagoWordNet. 2010. "dress down" http://smartdefine.org/dress_down/definitions/1271425 (accessed July 20, 2018).
HarvardWordNet 2010, dress down, Smart Define, viewed 20 July, 2018, <http://smartdefine.org/dress_down/definitions/1271425>.
MLAWordNet. "dress down" 23 October 2010. Web. 20 July 2018. <http://smartdefine.org/dress_down/definitions/1271425>