Meaning of prepotent

pre•po•tent

Pronunciation: (prē-pōt'nt), [key]
— adj.
  1. preeminent in power, authority, or influence; predominant: a prepotent name in the oil business.
  2. noting, pertaining to, or having prepotency.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.