Entry 2 senses · 2 variants Webster, 1913 Equiponderate · E·qui·pon·der·ate · IPA v. i. v. t. 01 v. i. To be equal in weight; to weigh as much as another thing. 1. To be equal in weight; to weigh as much as another thing. 02 v. t. To make equal in weight; to counterbalance. 1. To make equal in weight; to counterbalance.