Entry 2 senses · 2 variants Webster, 1913 Misthink · Mis·think · IPA /mɪsˈθɪŋk/ v. i. v. t. 01 v. i. To think wrongly. 1. To think wrongly.[Obs.] 02 v. t. To have erroneous thoughts or judgment of; to think ill of. 1. To have erroneous thoughts or judgment of; to think ill of.[Obs.]