adstipulationRom. Law.|ædˌstɪpjuːˈleɪʃən| [ad. L. a(d)stipulātiōn-emn. of action f.a(d)stipulā-ri; see prec. and -ion1.] The addition of, or acting as, a second receiving party in a bargain. 1880Muirhead Gaius iii. §114 Adstipulation by a slave is of no avail.