The state or quality of being composed or calm; composure or the arrangement of elements in a composition.
From Latin 'compositus' plus -ure suffix (which creates abstract nouns from adjectives). Related to 'composure' but with emphasis on the compositional arrangement.
This word is essentially a fancy synonym for 'composure,' but it's archaic and rarely used today—you'll find it in old English literature where it carries a slightly more formal, dignified weight than the modern word.
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