Emily Dickinson Lexicon

COM-POS'URE, n. [comp'ozhur. See Compose.]

1. The act of composing, or that which is composed; a composition; as, a form of prayer of public composure; a hasty composure. In the composures of men, remember you are a man. – Watts. In this use, this word has given way to composition.
2. Composition; combination; arrangement; order. [Little used.] When such a composure of letters, such a word, is intended to signify certain thing. – Holder.
3. The form, adjustment, or disposition of the various parts. In composure of his face, / Lived a fair but manly grace. – Crashaw. The outward form and composure of the body. – Duppa.
4. Frame; make; temperament. His composure must be rare indeed, / Whom these things can not blemish. – Shak.
5. A settled state of the mind; sedateness; calmness; tranquility. When the passions are silent, the mind enjoys its most perfect composure. – Watts. [This is the most common use of this word.]
6. Agreement; settlement of differences; composition. [Little used.] The treaty at Uxbridge gave the fairest hopes of happy composure. – King Charles.