Definition of "imperturbation" [im•per•tur•ba•tion]

• Freedom from agitation of mind; calmness. (noun)

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• "These strictures are pronounced on all sides at the present day, in spite of the very significant silence and imperturbation (not to say supination) of"
• "And, after all, she only voiced the general opinion of the school, which, by an unwritten law, had established a calm imperturbation as the height of good breeding."
• "The woman's strength and determination contrasted with the man's weakness and vacillation; her reasoning imperturbation, prudent foresight, and love of order and activity, with his excessive irritability and sensitiveness, wanton carelessness, and unconquerable propensity to idleness and every kind of irregularity."