Definition of ratchet:
		
		
		(n) :
		
		a pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc; a mechanism composed of a ratchet wheel, or ratch, and pawl
		
			
	
		
		
		(v) :
		
		to cause to become incremented or decremented; to increment or decrement
		
								
				"it's time to ratchet up the intensity level here."