Entry 1 sense Webster, 1913 Misinformation /mĭsˌ-ĭn-fẽrm-āsh'-ən/ · Mis·in·for·ma·tion · IPA /ˌmɪs.ɪn.fɚˈmeɪ.ʃən/ 01 n. Untrue or incorrect information. 1. Untrue or incorrect information.