Law Dictionary arguendo adverb ar·gu·en·do \ ˌär-gyu̇-ˈwen-dō \ Trending Now: More Trending: charlatan lowlife kakistocracy slimeball salacious SEE ALL See What's Trending Now See More Trending Words What's Trending Now More Trending Words charlatan 'faker or fraud' lowlife 'a person of low moral character' kakistocracy 'government by the worst people' slimeball 'a morally repulsive or odious person' salacious 'arousing or appealing to sexual desire' SEE ALL legal Definition of arguendo : for the sake of argument assuming arguendo that the allegations are true Origin and Etymology of arguendo New Latin Seen and Heard What made you want to look up arguendo? Please tell us where you read or heard it (including the quote, if possible). show hide