d

/di:/ plural D's, d's noun (C)

1 the fourth letter of the English alphabet

2 the number 500 in the system of roman numerals D

1 the second note in the scale 1 (8), or the musical key 1 (4) based on this note

2 a mark that a teacher gives to a student's work, showing that it is not very good

—see also: D and C, D­Day d

1 the written abbreviation of died: John Keats d 1821

2 the abbreviation of penny (4) in the system of money used in Britain before 1971