Definition of D noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//diː//
    ; NAmE NAmE//diː//
    (also d) [countable, uncountable] (pl. Ds, D’s, d’s
    BrE BrE//diːz//
    ; NAmE NAmE//diːz//
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  1. 1 the fourth letter of the English alphabet ‘Dog’ begins with (a) D/‘D’.
  2. 2 D (music) the second note in the scale of C major
  3. 3D the fourth highest mark/grade that a student can get for a piece of work, showing that it is not very good He got (a) D/‘D’ in/for Geography.
  4. see also D-Day
See the Oxford Advanced American Dictionary entry: D