
1) Nigerian province
Found on
https://www.crosswordclues.com/clue/bornu

(from the article `Africa`) ...in Egypt and Ethiopia, and Islam is common along the coast of eastern Africa and is expanding southward in western Africa. Many of the Sudanic ...
Found on
http://www.britannica.com/eb/a-z/b/95

historical kingdom and emirate in northeastern Nigeria. Bornu was originally the southernmost province of the Kanem empire, an ancient kingdom that ...
Found on
http://www.britannica.com/eb/a-z/b/95

Kingdom of the 9th-19th centuries to the west and south of Lake Chad, western central Africa. Converted to Islam in the 11th century, Bornu reached its greatest strength in the 15th-18th...
Found on
http://www.encyclo.co.uk/local/20688

Kingdom of the 9th–19th centuries to the west and south of Lake Chad, western central Africa. Converted to Islam in the 11th century, Bornu reached its greatest strength in the 15th–18th centuries. From 1901 it was absorbed in the British, French, and German colonies in this area, which became the states of Niger, Cameroon, and Nigeria. T...
Found on
https://www.encyclo.co.uk/local/21221

a former sultanate in Africa, SW of Lake Chad: now largely a province in Nigeria.
Found on
https://www.infoplease.com/dictionary/bornu
No exact match found.