Entry 1 sense Webster, 1913 Equanimous · E·quan·i·mous · IPA /ɪˈkwæn.ɪ.məs/ 01 a. Of an even, composed frame of mind; of a steady temper; not easily elated or depressed. 1. Of an even, composed frame of mind; of a steady temper; not easily elated or depressed.