Entry 2 senses · 2 variants Webster, 1913 ataractic · IPA adj. n. 01 adj. tending to soothe or calm or tranquilize 1. tending to soothe or calm or tranquilize Syn. calming, sedative, soothing, tranquilizing 02 n. drug that reduces nervous tension and gives peace of mind. 1. drug that reduces nervous tension and gives peace of mind. Syn. ataraxic