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

Don (honorific) The terms Don (in Spanish language, Spanish and Italian language, Italian), Dom (in Portuguese language, Portuguese), and Domn (in Romanian language, Romanian), are honorific prefixes derived from the Latin language, Latin ''Dominus'', meaning ...

, 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 Death is the end of life; the irreversible cessation of all biological functions that sustain a living organism. Death eventually and inevitably occurs in all organisms. The remains of a former organism normally begin to decompose sh ...

, as an abbreviation. * District of Columbia Department of Transportation, whose logo is "d." * ''

Schubert Thematic Catalogue ''Schubert: Thematic Catalogue of all his Works in Chronological Order'', also known as the Deutsch catalogue, is a numbered list of all compositions by Franz Schubert compiled by Otto Erich Deutsch. Since its first publication in 1951, Deutsch ...

'', 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