Entry 1 sense Webster, 1913 Monovalent /mänˌ-əv-āl'-ənt/ · Mo·nov·a·lent · IPA /mˌɑnəvˈeɪlənt/ 01 a. Having a valence of one; univalent. See Univalent. 1. Having a valence of one; univalent. See Univalent.(Chem.) See: Univalent