Definition of click:
		
		
		(n) :
		
		a brief, sharp, not particularly loud, relatively 
high-pitched sound produced by the impact something small and hard against something hard, such as by the operation of a 
switch, a 
lock or a 
latch, or a finger pressed against the thumb and then released to strike the hand; an 
ingressive sound made by 
coarticulating a 
velar or 
uvular closure with another closure
		
 
								
				"I turned the key, the lock gave a click and the door opened."
			
			
	
		
		
		(v) :
		
		to operate (a switch, etc) so that it makes a click; to press and release (a button on a computer mouse)
		
								
				"he bent his fingers back until the joints clicked."
			
			
	
		
		
		(interjection) :
		
		the sound of a click
		
								
				"click! The door opened."