mes·mer·ize (BrE also-ise) [mesmerizemesmerizesmesmerizedmesmerizing] BrE [ˈmezməraɪz] NAmE [ˈmezməraɪz] verb usually passive ~ sb to have such a strong effect on you that you cannot give your attention to anything else Syn: ↑fascinate •They were mesmerized by her performance. Derived Word: ↑mesmerizing Verb forms: