I. Sen ‧ e ‧ ca 1 /ˈsenəkə, ˈsenɪkə/ BrE AmE
(about 4 BC-65 AD) a Roman ↑ philosopher , politician, and writer of plays. He was the teacher of Nero, the EMPEROR, and had a lot of influence over him. But later, Nero believed Seneca was involved in a plan to kill him, and ordered him to kill himself.
II. Seneca 2 BrE AmE
1 . [P] a Native American tribe who live on ↑ reservation s (=areas of land that are kept separate for Native Americans to live on) in western New York State and eastern Ohio
2 . [countable] a member of the Seneca tribe
3 . [uncountable] a Native American language spoken by the Seneca tribe