Entry 1 sense Webster, 1913 Misconception /mĭs-kən-sĕp'-shən/ · Mis·con·cep·tion · IPA /ˌmɪs.kənˈsɛp.ʃən/ 01 n. Erroneous conception; false opinion; wrong understanding. 1. Erroneous conception; false opinion; wrong understanding.