Avicenna Syllabification: (Av·i·cen·na)Pronunciation: /ˌavəˈsenə/Definition of Avicenna (980–1037), Islamic philosopher and physician, born in Persia; Arabic name ibn-Sina. His philosophical system was the major influence on the development of scholasticism. Avicenna in other Oxford dictionaries Definition of Avicenna in the British & World English dictionary