Va·le·ri·an 
(və-lîrē-ən) Originally Publius Licinius Valerianus. Died c. AD 260.
(və-lîrē-ən) Originally Publius Licinius Valerianus. Died c. AD 260. Emperor of Rome (253-260) who, as coruler with his son Gallienus (c. 218-268), confronted invasions by the Goths and Persians. He was captured and killed by Persian forces (260).