FatimidPronunciation: /ˈfatɪmɪd/Definition of Fatimid noun a member of a dynasty which ruled in parts of northern Africa, Egypt, and Syria from 909 to 1171, and founded Cairo as its capital in 969. adjective relating to the Fatimids. Derivatives Fatimite noun & adjective Origin:from Arabic Fāṭima (see Fatima, from whom the dynasty is said to descend) + -id3Fatimid in other Oxford dictionaries Definition of Fatimid in the US English dictionary