Haseki Sultan (Ottoman Turkish: خاصکى سلطان‎, Ḫāṣekī Sulṭān; Turkish pronunciation: [haseˈci suɫˈtaːn]) was the imperial title used for the chief consort of an Ottoman Sultan. Haseki sultan meant "chief consort" or "single favorite" of the sultan. In later years, the meaning of the title changed to "imperial consort". Hürrem Sultan, principal consort of Suleiman the Magnificent, was the first holder of this title. The title haseki sultan was only used until 17th century. After that, Kadınefendi became the highest ranking title for imperial consorts.