ˈmisappreciˈation [mis-1 4.] Erroneous estimation or valuation. 1854Faber Growth in Holiness (1872) xi. 178 Want of sympathy with contemplation leads to a misappreciation of austerity.1868Nettleship Ess. Browning i. 19 The lovers fail by reason of their mistresses' misappreciation.