Source : Webster's Revised Unabridged Dictionary (1913)

Composure \Com*po"sure\, n. [From {Compose}.]
   1. The act of composing, or that which is composed; a
      composition. [Obs.]

            Signor Pietro, who had an admirable way both of
            composure [in music] and teaching.    --Evelyn.

   2. Orderly adjustment; disposition. [Obs.]

            Various composures and combinations of these
            corpuscles.                           --Woodward.

   3. Frame; make; temperament. [Obs.]

            His composure must be rare indeed Whom these things
            can not blemish.                      --Shak.

   4. A settled state; calmness; sedateness; tranquillity;
      repose. ``We seek peace and composure.'' --Milton.

            When the passions . . . are all silent, the mind
            enjoys its most perfect composure.    --I. Watts.

   5. A combination; a union; a bond. [Obs.] --Shak.

Source : WordNet®

composure
     n : steadiness of mind under stress; "he accepted their problems
         with composure and she with equanimity" [syn: {calm}, {calmness},
          {equanimity}] [ant: {discomposure}]