 
		
		Definition of bounce:
		
		
		(v) :
		
		to change the direction of motion after hitting an obstacle; to move quickly up and then down, or vice versa, once or repeatedly
		
								
				"he bounced the baby on his knee."
			
			
	
		
		
		(n) :
		
		a change of direction of motion after hitting an obstacle; a movement up and then down (or vice versa), once or repeatedly