8D or 8-D may refer to:
Eight-dimensional space "Grinning with glasses", an emoticon in which the "8" represents open eyes and the "D" an open mouth, see List of emoticons Eight disciplines problem solving
Transport 8D Technologies, a Canadian company that develops bicycle-sharing systems GCR Class 8D, a class of British 4-4-2 steam locomotive Secondary State Highway 8D (Washington), former name of Washington State Route 141 Typ 8D, first-generation Audi A4
IATA airline codes Astair Expo Aviation Servant Air
See also
D8 (disambiguation)