CINNA, L. CORN. a Roman who oppressed the republic with his cruelties. He was banished by Octavius for attempting to make the fugitive slaves free. He joined himself with Marius, and with him at the head of the slaves he defeated his enemies and made himself consul even to a fourth time. He massacred so many citizens at Rome, that his name became odious, and one of his officers assassinated him at Ancona, as he was preparing war against Sylla.