DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   equanimity
       n 1: steadiness of mind under stress; "he accepted their
            problems with composure and she with equanimity" [syn:
            composure, calm, calmness, equanimity] [ant:
            discomposure]