Entry 2 senses · 2 variants Webster, 1913 Misinform /mĭs-ĭnˌ-fôrm'/ · Mis·in·form · IPA /mɪsˌɪnfˈɔrm/ v. t. v. i. 01 v. t. To give untrue information to; to inform wrongly. 1. To give untrue information to; to inform wrongly. 02 v. i. To give untrue information; (with against) to calumniate. 1. To give untrue information; (with against) to calumniate.[R.]