Source : Webster's Revised Unabridged Dictionary (1913)

Powwow \Pow"wow`\, v. i.
   1. To use conjuration, with noise and confusion, for the cure
      of disease, etc., as among the North American Indians.

   2. Hence: To hold a noisy, disorderly meeting. [Colloq. U.
      S.]

Source : WordNet®

powwow
     n : a quick private conference [syn: {huddle}]
     v : hold a powwow, talk, conference or meeting