Definition of till:
		
		
		(preposition) :
		
		up 
to; as 
late as
		
 
			
	
		
		
		(conjunction) :
		
		up to the time that (something is true); before (something is true)
		
			
	
		
		
		(n) :
		
		a 
cash register; a removable box within a cash drawer containing the money
		
 
								
				"pull all the tills and lock them in the safe"