The Collaborative International Dictionary of English v.0.48:

Panoply \Pan"o*ply\ (p[a^]n"[-o]*pl[y^]), n. [Gr. panopli`a;
   pa^s, pa^n, all + "o`plon tool, implement, in pl., armor,
   arms.]
   1. Defensive armor in general; a full suit of defensive
      armor. --Milton.
      [1913 Webster]

            We had need to take the Christian panoply, to put on
            the whole armor of God.               --Ray.
      [1913 Webster]

   2. Hence: Any full set of elaborate attire, complete with
      accessories or accompanying paraphernalia; any elaborate
      special or ceremonial attire and equipment.
      [PJC]

   3. Hence: Any impressive complete array; as, the full panoply
      of a presidential funeral.
      [PJC]

   4. Hence: [Fig.:] Any complete array of devices used in an
      endeavor; as, to deploy the full panoply of writer's
      techniques.
      [PJC] panoptic

WordNet (r) 3.0 (2006):

panoply
    n 1: a complete and impressive array