Noun
valide sultan (plural valide sultans)
(historical) The mother (or in special cases, the sister, grandmother, or stepmother) of a reigning sultan of the Ottoman Empire
His mother was Valide Sultan Emine Hatun (daughter of Suleyman Bey, ruler of Dulkadirids ), his father's third consort. Source: Internet
On occasion, the Valide Sultan would become involved in state politics. Source: Internet