Abdullah Mujahid is a citizen of Afghanistan who is still held in extrajudicial detention after being transferred from United States Guantanamo Bay detainment camps, in Cuba — to an Afghan prison.

Mujahideen is the plural form of mujahid , the term for one engaged in Jihad. In English usage, it mostly referred to the guerrilla type military outfits led by the Muslim Afghan warriors in the Soviet war in Afghanistan, but now it often refers to other jihadist outfits in various countries.