DNU or Dnu may refer to: The New University Hospital (DNU), the largest single hospital in Denmark Dnipro National University DAT LT (ICAO airline code: DNU) ISO 639:dnu, the ISO 639-3 code for Danau language Necessity and Urgency Decree (in Spanish, "Decreto de necesidad y urgencia"), a special kind of order issued by the President of Argentina Dnu Huntrakul, a prominent Thai composer and chamber musician