WDM may refer to: Science and technology Warm dark matter in cosmology Warm dense matter, a state of matter between solid and plasma Wavelength-division multiplexing, a signal transmission method Wax Deposition Modeling, an additive 3d printing technology wdm, the WINGs Display Manager on Unix Windows Driver Model, a framework for device drivers in Windows Wide Diesel Mixed, a series of Indian locomotives Other West Des Moines, Iowa, United States, a city Western Development Museum of Saskatchewan World Development Movement, a British campaign for social justice Waking Down in Mutuality, an American "spiritual awakening" association Warith Deen Muhammad (Wallace D. Muhammad), a leader of the Nation of Islam WDM (Washington, D.C.), an early 1920s radio station he:ריבוב#WDM