The Collaborative International Dictionary of English v.0.48:

Composed \Com*posed"\, a.
   Free from agitation; calm; sedate; quiet; tranquil;
   self-possessed.
   [1913 Webster]

         The Mantuan there in sober triumph sate,
         Composed his posture, and his look sedate. --Pope.
   -- Com*pos"ed*ly, adv. -- Com*pos"ed*ness, n.
   [1913 Webster]