barter (subs.) Copy link Outline 1. mūtātĭo2. permūtātĭo • barter (subs.): 1. mūtātĭo: Ter. 2. permūtātĭo: Cic.: Dig.: the inhabitants of the interior employ b., interiores permutatione mercium utuntur, Tac.: v. to barter, exchange.