(Standard Definition DVD) A redundant reference to DVD. All DVDs are standard definition (SD), but the SD is sometimes used as a prefix to emphasize that the disc being referenced is not high-definition (HD). See Blu-ray and SD formats.
"SD DVD." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/sd-dvd>.
SD DVD. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/sd-dvd