Meaning of D in English

1. n. (also d) (pl. Ds or D's)

1. the fourth letter of the alphabet.

2 Mus. the second note of the diatonic scale of C major.

3 (as a Roman numeral) 500.

4 DEE.

5 the fourth highest class or category (of academic marks etc.). 2.

symb. Chem. the element deuterium. 3. abbr. (also D.)

1. US Democrat.

2 dimension (3-D).

Oxford English vocab.      Оксфордский английский словарь.