Reign v. i. [imp. & p. p. Reigned p. pr. & vb. n. Reigning.]
 1. To possess or exercise sovereign power or authority; to exercise government, as a king or emperor;; to hold supreme power; to rule.
    We will not have this man to reign over us.   --Luke xix. 14.
 Shall Banquo's issue ever
 Reign in this kingdom?   --Shak.
 2. Hence, to be predominant; to prevail. “Pestilent diseases which commonly reign in summer.”
 3. To have superior or uncontrolled dominion; to rule.
    Let not sin therefore reign in your mortal body.   --Rom. vi. 12.
 Syn: -- To rule; govern; direct; control; prevail.
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 reigning
      adj : exercising power or authority [syn: regnant, ruling]