Definition of startle:
		
		
		(n) :
		
		a sudden 
motion or 
shock caused by an unexpected alarm, surprise, or apprehension of danger
		
 
			
	
		
		
		(v) :
		
		to move suddenly, or be excited, on feeling alarm; to start; to excite by sudden alarm, surprise, or apprehension; to frighten suddenly and not seriously; to alarm; to surprise