What is the meaning of Dup?

(v.t.) To open; as, to dup the door.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). dup. Retrieved September 27, 2026, from http://smartdefine.org/dup/definitions/2001033
ChicagoWebster's. 2011. "dup" http://smartdefine.org/dup/definitions/2001033 (accessed September 27, 2026).
HarvardWebster's 2011, dup, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/dup/definitions/2001033>.
MLAWebster's. "dup" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/dup/definitions/2001033>