of, relating to, or belonging to a tall Negroid pastoral people inhabiting the S Sudan, parts of Kenya and Uganda, and neighbouring countries
3.
relating to or belonging to the group of languages spoken by the Nilotic peoples
—n
4.
a group of languages of E Africa, including Luo, Dinka, and Masai, now generally regarded as belonging to the Chari-Nile branch of the Nilo-Saharan family
[C17: via Latin from Greek Neilotikós, from Neilos the Nile]