DeciusPronunciation: /ˈdiːsɪəs/Definition of Decius (circa 201–51), Roman emperor 249–51; full name Gaius Messius Quintus Trajanus Decius. He was the first Roman emperor to promote systematic persecution of the Christians in the empire. Derivatives Decian adjective Decius in other Oxford dictionaries Definition of Decius in the US English dictionary
