Entry 1 sense Webster, 1913 Misappropriation /mĭsˌ-əp-rōpˌ-rē-āsh'-ən/ · Mis·ap·pro·pri·a·tion · IPA /mˌɪsəprˌoʊpriːˈeɪʃən/ 01 n. Wrong appropriation; wrongful use. 1. Wrong appropriation; wrongful use.