Definition of nisi prius:
		
		
		(n) :
		
		Syrian who was a Christian bishop and Patriarch of Constantinople in the early fifth century; one of the major heresies concerning the doctrine of the hypostasis of Christ was named after him (died in 451)
		
	 
 
		
		
		Definition of nisi prius:
		
		
		(n) :
		
		Syrian who was a Christian bishop and Patriarch of Constantinople in the early fifth century; one of the major heresies concerning the doctrine of the hypostasis of Christ was named after him (died in 451)