(Ultra High Definition 4K) A resolution of 3840x2160 pixels. The 4K refers to the 3,840 horizontal pixels. See 4K TV, UHDTV and screen resolution.
"UHD 4K." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/uhd-4k>.
UHD 4K. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/uhd-4k