Law Dictionary ad idem adverb \ ˈad-ˈī-dəm, ˈäd-ˈē-dem \ Trending Now: More Trending: symbiote charlatan lowlife kakistocracy slimeball SEE ALL See What's Trending Now See More Trending Words What's Trending Now More Trending Words symbiote 'an organism living in symbiosis' charlatan 'faker or fraud' lowlife 'a person of low moral character' kakistocracy 'government by the worst people' slimeball 'a morally repulsive or odious person' SEE ALL legal Definition of ad idem : in agreement : at a meeting of the minds the parties were ad idem Origin and Etymology of ad idem Latin, to the same Seen and Heard What made you want to look up ad idem? Please tell us where you read or heard it (including the quote, if possible). show hide