Entry 1 sense Webster, 1913 Mismanagement /mĭs-măn'-ĭj-mənt/ · Mis·man·age·ment · IPA /ˌmɪsˈmænɪd͡ʒmənt/ 01 n. Wrong or bad management; as, he failed through mismagement. 1. Wrong or bad management; as, he failed through mismagement.