Definition of fall:
		
	
		
		
		(v) :
		
		to move to a lower position under the effect of 
gravity; to come down, to 
drop or 
descend
		 
								
				"and so it falls to me to make this important decision."
			
			
	
		
		
		(n) :
		
		the act of moving in a 
fluid or 
vacuum under the effect of 
gravity to a 
lower position; a reduction in quantity, pitch, etc
		
 
								
				"the fall of Rome"