Mamluk or Mamaluk (/ˈmæmluːk/; Arabic: مملوك, romanized: mamlūk (singular), مماليك, mamālīk (plural); translated as "one who is owned", meaning "slave") were non-Arab, ethnically diverse (mostly Turkic, Caucasian, Mongol, Eastern and Southeastern European) enslaved mercenaries, slave-soldiers, and freed slaves who were assigned high-ranking military and administrative duties in the Muslim world.
The most enduring Mamluk realm was the knightly military class in medieval Egypt, which developed from the ranks of slave-soldiers. Originally the Mamluks were slaves of Turkic origins from the Eurasian Steppe, but the institution of military slavery spread to include Circassians, Mongols, Abkhazians, Georgians, Armenians, Russians, and Hungarians, as well as peoples from the Balkans such as Albanians, Greeks, and South Slavs (see Saqaliba). They also recruited from the Egyptians. The "Mamluk/Ghulam Phenomenon", as David Ayalon dubbed the creation of the specific warrior class, was of great political importance; for one thing, it endured for nearly 1,000 years, from the 9th century to the early 19th. (See: Ghilman.)