Definition of D:

Roman numeral for 500; in music, the second note of the scale, corresponding to Re. M. D., doctor of medicine; D. D., doctor of divinity; LL. D., doctor of laws; D. C., in music, da capo, which see.

Usage examples:

• D acted the part of mutual friend. W. C. Scully in "Reminiscences of a South African Pioneer".

• " You- you- d d don't-" " Yes- it's time you knew this. Payne Erskine in "The Eye of Dread".

• But I said I'd go you, and I will. Ralph Bonehill in "Leo the Circus Boy".

• Apply the equation of time to find the G. A. T. Apply the D R. Lo. Ernest Gallaudet Draper in "Lectures in Navigation".