What is "to challenge the array"

Array \Ar*ray"\, n. [OE. arai, arrai, OF. arrai, arrei, arroi, order, arrangement, dress, F. arroi; a (L. ad) + OF. rai, rei, roi, order, arrangement, fr. G. or Scand.; cf. Goth. raidjan, garaidjan, to arrange, MHG. gereiten, Icel. rei[eth]i rigging, harness; akin to E. ready. Cf. Ready, Greith, Curry.]

1. Order; a regular and imposing arrangement; disposition in regular lines; hence, order of battle; as, drawn up in battle array.

   Wedged together in the closest array.
   --Gibbon.

2. The whole body of persons thus placed in order; an orderly collection; hence, a body of soldiers.

   A gallant array of nobles and cavaliers.
   --Prescott.

3. An imposing series of things.

   Their long array of sapphire and of gold.
   --Byron.

4. Dress; garments disposed in order upon the person; rich or beautiful apparel.
   --Dryden.

5. (Law)

   1. A ranking or setting forth in order, by the proper officer, of a jury as impaneled in a cause.

   2. The panel itself.

   3. The whole body of jurors summoned to attend the court.

      To challenge the array (Law), to except to the whole panel.
      --Cowell.
      --Tomlins.
      --Blount.

      Commission of array (Eng. Hist.), a commission given by the prince to officers in every county, to muster and array the inhabitants, or see them in a condition for war.
      --Blackstone.