Entry 2 senses · 2 variants Webster, 1913 Overmeasure · O·ver·meas·ure · IPA v. t. n. 01 v. t. To measure or estimate too largely. 1. To measure or estimate too largely. 02 n. Excessive measure; the excess beyond true or proper measure; surplus. 1. Excessive measure; the excess beyond true or proper measure; surplus.