From Longman Dictionary of Contemporary Englishcomposurecom‧po‧sure /kəmˈpəʊʒə $ -ˈpoʊʒər/ noun [uncountable] CALMthe state of feeling or seeming calmrecover/regain your composure (=become calm after feeling angry or upset) Carter looked stunned, but he soon regained his composure.keep/maintain your composure (=stay calm) The widow broke down in tears, but her daughters maintained their composure. He has lost his composure under the pressure of the situation.
Examples from the Corpus
composure• She was trying desperately to regain her composure.• Slowly a sense of her own power made itself clear to her, and she regained her composure.• He spoke without much prompting and I was encouraged by his composure.• Its owners showed far less composure, and streamed towards us from all sides.• Wagner remembered that Tuesday with quiet composure, neither tearful nor vengeful.• Her rickety composure had nothing whatever to do with him.• Gone was the vagueness, gone the composure.lost ... composure• And in the face of a challenge far greater than athletic competition, she never lost her composure.• Another cadet - freckled Hake Bjortson - totally lost his composure.Origin composure (1500-1600) compose 