mis·sive /ˈmɪsɪv/
  公文,書信(a.)送出的
  Mis·sive a.
  1. Specially sent; intended or prepared to be sent; as, a letter missive.
  2. Missile. “The missive weapons fly.”
  Letters missive, letters conveying the permission, comand, or advice of a superior authority, as a sovereign. They are addressed and sent to some certain person or persons, and are distinguished from letters patent, which are addressed to the public.
  Mis·sive, n.
  1. That which is sent; a writing containing a message.
  2. One who is sent; a messenger. [Obs.]
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  missive
       n : a written message addressed to a person or organization;
           "mailed an indignant letter to the editor" [syn: letter]