DEI is a three-letter acronym. It may refer to one of the following:*DEI (Greek national electrical company)FIFA Trigramme for Dutch East IndiesDale Earnhardt, Inc., a current NASCAR team Dynamic Electroluminescence Imaging, real-time imaging of electronic componentsDEI, Dayalbagh Educational Institute, university in Agra, IndiaDEI (Dabney Eats It), the lounge in Dabney House at Caltech. Also serves as Dabney House's motto.Destroy Erase Improve, a 1995 album by Swedish heavy metal band Meshuggah… (More on Dei)