 
		
		Definition of what:
		
		
		(n) :
		
		which thing, event, circumstance, etc.: used interrogatively in asking for the specification of an identity, quantity, quality, etc; 
that; 
which
		 
								
				"what is your address?"
			
			
	
		
		
		(v) :
		
		in some manner or degree; in part; partly; usually followed by with; such; this is; that is
		
								
				"what with singing and joking, the time passed quickly."
			
			
	
		
		
		(conjunction) :
		
		that which; those which; the thing that
		
								
				"he knows what he wants."
			
			
	
		
		
		(interjection) :
		
		an expression of surprise or disbelief; [mostly British colloquialism]: is that not true?
		
								
				"what! That's amazing."