[equa.nim.i.ty] n, pl -ties [L aequanimitas, fr. aequo animo with even mind] (ca. 1616) 1: evenness of mind esp. under stress
2: right disposition: balance syn equanimity, composure, sangfroid mean evenness of mind under stress. equanimity suggests a habit of mind that is only rarely disturbed under great strain "accepted her troubles with equanimity". composure implies the controlling of emotional or mental agitation by an effort of will or as a matter of habit "maintaining his composure even under hostile questioning". sangfroid implies great coolness and steadiness under strain "handled the situation with professional sangfroid".