n. [ L. aequanimitas, fr. aequanimus: cf. F. équanimité. See Equanimous. ] Evenness of mind; that calm temper or firmness of mind which is not easily elated or depressed; patience; calmness; composure; as, to bear misfortunes with equanimity. [ 1913 Webster ]
(n) steadiness of mind under stress, Syn. equanimity, calm, calmness, Ant. discomposure, Example:he accepted their problems with composure and she with equanimity