Dee might refer to: a name of the letter "D" an abbreviation for the dead-end elimination algorithm (DEE) "DEE" appearing after a person's name indicates that person's a board-certified "Diplomate Environmental Engineer" (DEE) as bestowed by the American Academy of Environmental Engineers. Dee (song) by Randy Rhoads several rivers: River Dee, Aberdeenshire, in Scotland River Dee, Galloway, also in Scotland River Dee, Wales, called Afon Dyfrdwy in Welsh In chemistry, an abbreviation for Die… (More on Dee)