D

noun
1
the fourth letter of the English alphabet
د, چهارمین حرف الفبای انگلیسی, حرف د
2
the second note in the scale of C major
رِ
3
a grade that a student can get for a piece of work or course of study, showing that it is not very good
نمره ضعیف
He got (a) D in geography.
abbreviation
1
democrat; democratic
دموکرات, دموکراتیک
symbol
1
the number 500 in Roman numerals
عدد ۵۰۰ در اعداد رومی