Entry 2 senses · 2 variants Webster, 1913 Overpoise · O·ver·poise · IPA v. t. n. 01 v. t. To outweigh; to overbalance. 1. To outweigh; to overbalance.[R.] 02 n. Preponderant weight; a counterbalance. 1. Preponderant weight; a counterbalance.[R.]