vox populiPronunciation: /ˈpɒpjʊliː, -lʌɪ/Definition of vox populi noun [mass noun] the opinions or beliefs of the majority: her poems weren’t exactly the vox populiOrigin: mid 16th century: from Latin, literally 'the people's voice'vox populi in other Oxford dictionaries Definition of vox populi in the US English dictionary