D.

D. or d. may refer to, usually as an abbreviation:

• Don (honorific), a form of address in Spain, Portugal, Italy, and their former overseas empires, usually given to nobles or other individuals of high social rank.
• Date of death, as an abbreviation.
• District of Columbia Department of Transportation, whose logo is "d."
• Schubert Thematic Catalogue, also known as the Deutsch catalogue (or D.), a numbered list of all compositions by Franz Schubert compiled by Otto Erich Deutsch.
• a penny, from the Latin denarius.

See also

• D (disambiguation), other meanings of "D"
• D, the letter