Dm Definition

abbreviation
Decimeter(s)
Webster's New World
Data management.
American Heritage
Deutsche mark.
Webster's New World
Doctor of Music.
Webster's New World
(computing, DWH) Abbreviation of Dimensional modeling.
Wiktionary
symbol

(metrology) Symbol for the decimeter (decimetre), an SI unit of length equal to 10−1 meters (metres).

Wiktionary